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Holden1988–2020 Critical issues documented

Holden Commodore VZ: common faults & what to check

The VZ is the Holden Commodore built 2004–2007. It was sold here with the 3.6 V6 petrol, 3.8 V6 petrol, and 5.7 V8 petrol. Of the 51 faults documented for the Commodore, 16 apply to this generation, each with its symptoms, what to inspect and a typical repair cost. Free, no account needed.

Check this exact Holden Commodore

  • Odometer history
  • Money owing
  • Reported stolen
  • Ownership history
  • Official NZ vehicle register data
  • NZ owned and operated

Type the plate for the free basics. The full record is a paid check from $13.49, one car at a time, no subscription.

No NZ plate yet, or buying in Australia? Pick the generation and engine and start a free check below. New to KickTyres? How the check works →

51

Documented faults

Critical

Most serious

$550–$1,900

Typical repair

51

Service milestones

Which Holden Commodore are you looking at?

19 generation variants documented. Pick the shape you recognise: the faults, the servicing and the timeline below all narrow to it. Free, no account needed.

Petrol

17 variants documented

Diesel

1 variant documented

Now narrow it to the engine

A 1.8 and a 2.4 of the same car do not fail the same way, so the faults below narrow to the engine as well as the year. Free, no account needed.

2004 is a changeover year: a Holden Commodore built then could be the VY or the VZ. Faults from all of them are shown, because guessing would hide real ones.

Start your free check on this Holden Commodore

No plate needed. You get the risk score, the buyer's checklist and the guided inspection for the exact car you picked above — not the whole nameplate.

Holden CommodoreEngine not picked yet

Pick the engine above first: the Commodore came with 3, and without it the report has to show all of their faults. Pick the engine

Free. The paid plate check is separate, and stays optional.

Can't confirm for this car

Holden Commodore · 2004

Narrowed to the year. No engine is recorded for this vehicle. Pick an engine to see which faults apply.

Tell us the engine, or check the engine code on the car, before relying on this.

  • No engine is recorded for this vehicle.

matched on year only

What to look out for

The checks worth doing on a Holden Commodore before you hand over any money. Every documented fault is listed below, each with its own page.

  • Serious issue

    Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2006/8380 was done.

    See why

    Front seat side airbag can fire when getting out recall (VY and VZ Commodore with seat side airbags, 2003-2005)

    VY Commodores built after April 2003 and VZ Commodores built before 2 December 2005 that have side airbags in the front seats were recalled (PRA 2006/8380). An earth wire under either front seat could come loose, and the side airbag could then go off when someone gets out of the seat. Cars without seat side airbags are not affected. The fix was free at a Holden dealer.

    What you would notice

    • Airbag warning light on
    • Usually no sign at all until it deploys

    Typically $0 to put right.

  • Costly issue

    Check fluid level and condition (colour, smell).

    See why

    IRS Rear Differential Carrier Bearing Failure

    The independent rear suspension differential assembly shared across the VT-VZ/WH-WL platform develops carrier bearing wear from approximately 120,000-180,000 km. Failed or failing bearings produce a speed-proportional droning that intensifies under drive load and diminishes on overrun. Neglected, worn carrier bearings allow the differential internals to move axially, accelerating ring-and-pinion wear and leading to bearing cage collapse and differential housing scoring. Simultaneous deterioration of the rear IRS cradle rubber bushings is common on these mileages and permits the entire differential assembly to shift under load, causing clunking on acceleration and deceleration that is distinct from bearing noise. Repair requires differential removal; extent of work ranges from bearing replacement alone to a complete differential exchange depending on housing condition.

    What you would notice

    • Harsh or delayed gear changes
    • Clunk or jolt when changing gears

    Typically $1,960–$3,920 to put right.

  • Costly issue

    Visually inspect trailing arm mount points for cracked or extruded rubber.

    See why

    IRS Rear Knuckle and Trailing Arm Bush Deterioration

    The independent rear suspension on VT-VZ Commodore uses bonded rubber bushes in the rear knuckle and trailing arm mounts. These deteriorate from age and load, causing camber and toe changes under cornering. Worn bushes produce clunking over bumps and uneven tyre wear. Replacement requires specialist press tooling to extract and reinstall the bonded rubber bushes.

    What you would notice

    • Clunking from rear suspension over bumps or on corner entry
    • Rear-end wander or vagueness on straight roads
    • Uneven or accelerated tyre wear on rear inner or outer edge
    • Rear alignment cannot be set to specification

    Typically $600–$1,400 to put right.

  • Common issue

    Scan ECU for stored and pending fault codes.

    See why

    VY/VZ Instrument Cluster Stepper Motor Seizure

    The VY and VZ instrument clusters (and their WK/WL Statesman equivalents) drive all analogue gauges through X27.168 micro stepper motors. The plastic gear teeth on these motors strip or seize with age and accumulated heat cycles, causing one or more gauges to read zero, stick at a fixed position, or sweep erratically on startup. The speedometer and fuel gauge are most frequently affected, though the tachometer and temperature gauge can also fail. The fault is electronic-mechanical rather than software-related; the cluster electronics and odometer memory remain intact. Repair involves cluster removal and replacement of the affected stepper motors, which are available as individual components and require desoldering from the cluster PCB. The repair preserves the stored odometer reading.

    What you would notice

    • Difficult starting or battery drain
    • Fault codes stored in ECU

    Typically $350–$700 to put right.

Holden Commodore service schedule

The 4 engines a 2004 Holden Commodore was sold with, each with its own intervals. Pick your engine above to narrow this to one. These are the model’s intervals — the car’s own service book is the only thing that can tell you what has actually been done to it.

VZ · 2004–2006 · 5.7L V8

Petrol

Due by distance

  1. 150,000 km

    Prime time to assess the condition of suspension bushings and engine mounts.

  2. 200,000 km

    Full cooling system refresh, including the radiator and hoses, as original components may become brittle.

  3. 250,000 km

    Ancillary components like the alternator and starter motor may need replacement.

VZ Commodore · 2004–2006 · 3.6L V6 (Alloytec) - Executive/Acclaim

Petrol

Due by distance

  1. 150,000 km

    Cooling system components like the radiator and hoses need a fresh inspection.

  2. 200,000 km

    Suspension bushings and struts may start to feel a bit tired, potentially affecting ride quality.

  3. 250,000 km

    Monitor alternator and starter motor reliability, as original electrical components may be nearing the end of their service life.

VY Commodore · 2002–2004 · 3.8L V6 (Ecotec) - Entry/Mid-range

Petrol

Due by distance

  1. 150,000 km

    Confirm the water pump and serpentine belt have been replaced if no service record exists.

  2. 200,000 km

    Inspect the fuel pump condition and verify the transmission fluid has been refreshed recently.

  3. 250,000 km

    Focus on the integrity of the cooling system components and confirm the alternator is providing a consistent charge.

VY Commodore · 2002–2004 · 5.7L V8 (LS1) - SS/SV8/Calais

Petrol

Due by distance

  1. 150,000 km

    Inspect the original radiator and cooling hoses for signs of brittleness.

  2. 200,000 km

    The suspension bushes and shock absorbers might be ready for an upgrade to restore that smooth factory ride.

  3. 250,000 km

    Have the engine's internal components and sensors reviewed to keep the LS1 running at its peak.

See all 16 issues for this oneDocumented for the exact year and engine you picked, including 4 rated critical.
Engine, transmission & cooling1

01IRS Rear Differential Carrier Bearing Failure

Check fluid level and condition (colour, smell).petrol1997–2007Transmission
CommonTransmission $1,960–$3,920 to fix

The independent rear suspension differential assembly shared across the VT-VZ/WH-WL platform develops carrier bearing wear from approximately 120,000-180,000 km. Failed or failing bearings produce a speed-proportional droning that intensifies under drive load and diminishes on overrun. Neglected, worn carrier bearings allow the differential internals to move axially, accelerating ring-and-pinion wear and leading to bearing cage collapse and differential housing scoring. Simultaneous deterioration of the rear IRS cradle rubber bushings is common on these mileages and permits the entire differential assembly to shift under load, causing clunking on acceleration and deceleration that is distinct from bearing noise. Repair requires differential removal; extent of work ranges from bearing replacement alone to a complete differential exchange depending on housing condition.

Symptoms to notice

  • Harsh or delayed gear changes
  • Clunk or jolt when changing gears

What to check

  1. Check fluid level and condition (colour, smell).
  2. Test shift quality through all gears.
  3. Look for slipping, delay or harsh engagement.

Parts involved: Differential.

Electrical1

02VY/VZ Instrument Cluster Stepper Motor Seizure

Scan ECU for stored and pending fault codes.petrol2002–2007Electrical
CommonElectrical $350–$700 to fix

The VY and VZ instrument clusters (and their WK/WL Statesman equivalents) drive all analogue gauges through X27.168 micro stepper motors. The plastic gear teeth on these motors strip or seize with age and accumulated heat cycles, causing one or more gauges to read zero, stick at a fixed position, or sweep erratically on startup. The speedometer and fuel gauge are most frequently affected, though the tachometer and temperature gauge can also fail. The fault is electronic-mechanical rather than software-related; the cluster electronics and odometer memory remain intact. Repair involves cluster removal and replacement of the affected stepper motors, which are available as individual components and require desoldering from the cluster PCB. The repair preserves the stored odometer reading.

Symptoms to notice

  • Difficult starting or battery drain
  • Fault codes stored in ECU

What to check

  1. Scan ECU for stored and pending fault codes.
  2. Test all electronic functions.
  3. Check battery voltage and alternator output.
Body, brakes, suspension & interior1 critical2

03Front seat side airbag can fire when getting out recall (VY and VZ Commodore with seat side airbags, 2003-2005)

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2006/8380 was done.2003–2005Interior
CommonInterior $0 to fix

VY Commodores built after April 2003 and VZ Commodores built before 2 December 2005 that have side airbags in the front seats were recalled (PRA 2006/8380). An earth wire under either front seat could come loose, and the side airbag could then go off when someone gets out of the seat. Cars without seat side airbags are not affected. The fix was free at a Holden dealer.

Symptoms to notice

  • Airbag warning light on
  • Usually no sign at all until it deploys

What to check

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2006/8380 was done. Give the VIN to a Holden or GM service agent and ask them to check for open recalls before paying. Check whether the front seats have side airbag labels on the outer seat bolster, and check the airbag light comes on with the ignition and then goes out. If a workshop inspection is possible: a Holden or GM service agent can confirm from the VIN whether the recall work was completed.

Where to look: Under both front seats

Ask the seller

  • “Does the car have seat side airbags, and was the earth wire recall done?”
  • “Has the airbag light ever been on?”

04IRS Rear Knuckle and Trailing Arm Bush Deterioration

Visually inspect trailing arm mount points for cracked or extruded rubber.petrol1997–2006Suspension
CommonSuspension $600–$1,400 to fix

The independent rear suspension on VT-VZ Commodore uses bonded rubber bushes in the rear knuckle and trailing arm mounts. These deteriorate from age and load, causing camber and toe changes under cornering. Worn bushes produce clunking over bumps and uneven tyre wear. Replacement requires specialist press tooling to extract and reinstall the bonded rubber bushes.

Symptoms to notice

  • Clunking from rear suspension over bumps or on corner entry
  • Rear-end wander or vagueness on straight roads
  • Uneven or accelerated tyre wear on rear inner or outer edge
  • Rear alignment cannot be set to specification

What to check

Visually inspect trailing arm mount points for cracked or extruded rubber. Check rear tyre wear pattern before purchase for signs of camber or toe irregularity. If a workshop inspection is possible: With car on a hoist, grab each rear wheel at 9 and 3 o'clock and rock it — detect play in knuckle bushes.

Where to look: Rear of vehicle, IRS knuckle mounting bushes and trailing arm front and rear mounts

Ask the seller

  • “Has the rear suspension had any bush replacements?”
  • “When was the last four-wheel alignment performed?”
  • “Any knocking or instability from the rear suspension?”
Depends on the exact engine — 12 moreDocumented for a specific engine we could not confirm from what you picked. Check the engine code on the car.
Engine, transmission & cooling8

01Oil sludge blocks the sump pickup screen on the Alloytec 3.6 V6 (VZ-VE)

petrol2004–2011Engine
OccasionalEngine $900–$7,500 to fix

Can't confirm for this car

The Alloytec V6 turns its oil into sludge if it is run on the long factory service interval or on the wrong grade, and that sludge blocks the fine mesh screen on the oil pickup down in the sump. Oil pressure then falls away without the driver ever being told, because these cars have no low oil pressure warning light at all. Workshops that open a failed one routinely find the pickup screen choked solid, and the first the owner knows about it is an engine that will not start. On this engine a full service history with short oil change intervals is worth more than almost anything else about the car.

Symptoms to notice

  • Engine oil like black tar on the dipstick
  • Thick brown crust on the underside of the oil filler cap
  • Service book showing 15,000 km or more between oil changes
  • Engine cranks strongly but will not start
  • Oil level low with no leak and no smoke

What to check

  1. Open the oil filler cap before the engine is started and shine your phone torch inside at the camshaft and at the underside of the cap, because clean honey-coloured oil is what you want and black tar or a thick coffee-coloured crust is a walk-away.
  2. Pull the dipstick and hold it up to the light for the same thing, looking for oil that is treacle-thick or leaves a gritty film.
  3. Ask for every service receipt and count the kilometres between oil changes, because anything near or over 15,000 kilometres is exactly what causes this.
  4. Ask what grade of oil was used and whether it was a full synthetic.
  5. Ask whether the engine has ever been apart and whether the sump was cleaned out at the time.
  6. Treat a cheap car with no service history as a car with an unknown engine.
  7. If a workshop inspection is possible: have the sump lowered so the oil pickup screen can be inspected, and have the oil pressure measured with a mechanical gauge on a hot engine.

Where to look: Down inside the sump under the engine, with the visible evidence at the oil filler on the rocker cover and on the dipstick.

Ask the seller

  • “How many kilometres between oil changes, and what oil was used?”
  • “Do you have every service receipt for the car?”
  • “Has the engine ever been apart, and was the sump cleaned?”
  • “Has the oil ever looked black and sludgy when it was changed?”

02LS1/Ecotec Timing Chain Tensioner and Guide Wear

Cold-start the engine and listen immediately for chain rattle from the timing cover.petrol1997–2006Engine
CommonEngine $800–$1,800 to fix

Can't confirm for this car

The plastic timing chain tensioner guides and tensioner shoe wear prematurely on both the 5.7L LS1 V8 and Ecotec V6 when oil change intervals are extended or oil pressure drops. Failed tensioners allow chain slack leading to timing retardation, misfires, and potential catastrophic valve contact with pistons on interference-fit cylinder heads.

The front of a dual overhead camshaft engine with the timing cover removed, exposing the timing chain and sprockets.Example of the part — not this vehicle

The front of a twin-cam engine with the timing cover off — chain, sprockets and guides.

Logansenf · CC BY-SA 4.0 · Wikimedia Commons

Symptoms to notice

  • Cold-start rattling from front of engine that may clear after warm-up
  • Check Engine light with camshaft position correlation codes P0016 or P0017
  • Rough idle on start-up
  • Ticking or slapping noise from timing cover area

What to check

  1. Cold-start the engine and listen immediately for chain rattle from the timing cover.
  2. Check the oil filler cap interior for sludge — poor maintenance accelerates tensioner failure.
  3. Verify service history for oil change intervals; any gap beyond 10,000km is a risk flag.

Where to look: Front of engine behind the timing cover, plastic guide rails and tensioner shoe

Parts involved: Timing chain.

Ask the seller

  • “What oil change intervals were followed over the vehicle's life?”
  • “Any cold-start noise from the engine?”
  • “Has the timing chain or tensioner ever been replaced?”

03Ecotec V6 Radiator Plastic End-Tank Cracking

Inspect both end tanks of the radiator for hairline cracks, white residue (dried coolant), or staining at the crimp joint.petrol1997–2006Cooling
Very commonCooling $350–$650 to fix

Can't confirm for this car

The Ecotec 3.8L V6 radiator uses crimped aluminium cores with injection-moulded nylon end tanks. Heat cycling causes the plastic to become brittle and crack at the crimp joint, resulting in sudden coolant loss. VT and VX models are particularly susceptible; failure can be rapid rather than a slow progressive leak.

Symptoms to notice

  • Coolant loss without visible external leak initially
  • Cracked or split plastic at top or bottom radiator tank
  • Steam from engine bay
  • Rising temperature gauge
  • Coolant puddle under front of vehicle after parking

What to check

  1. Inspect both end tanks of the radiator for hairline cracks, white residue (dried coolant), or staining at the crimp joint.
  2. Squeeze tanks by hand when cool — soft spots indicate impending failure.
  3. Check coolant reservoir level and look for brown discolouration indicating combustion contamination.

Where to look: Front of engine bay, radiator upper and lower end tanks at the crimp joint

Parts involved: Radiator.

Ask the seller

  • “Has the radiator ever been replaced?”
  • “Any history of overheating or coolant loss?”
  • “When was coolant last flushed and inspected?”

04LS1 Oil Pump Wear and Low Idle Oil Pressure

Check for oil leaks around valve covers, sump and gaskets.petrol1997–2007Engine
CommonEngine $3,850–$7,700 to fix

Can't confirm for this car

High-mileage LS1 5.7L Gen III engines (typically beyond 160,000 km) develop progressively falling oil pressure at idle when fully warmed. The primary causes are rotor wear inside the crankshaft-driven gerotor oil pump and widened crankshaft journal-to-bearing clearances from normal wear. The failure mode is worsened by extended oil-change intervals or sustained use of 5W-30 where 10W-40 or 15W-50 is appropriate. Sustained oil pressure below approximately 25 PSI at idle in warm conditions causes accelerated bearing wear and, without correction, leads to spun rod or main bearings and crankshaft journal scoring. Oil pump replacement addresses pump rotor wear but will not restore adequate pressure if bearing clearances are already excessive; those cases require a bottom-end recondition. High-performance and track-driven examples are disproportionately represented.

Symptoms to notice

  • Low oil pressure warning light
  • Difficult cold start or unstable idle

What to check

  1. Check for oil leaks around valve covers, sump and gaskets.
  2. Inspect coolant condition and level.

05Eaton M90 supercharger snout bearings and nylon coupler wear (L67 supercharged 3.8 V6)

petrol1996–2004EngineRead the full fault: symptoms, where to look, what to ask the seller

06LS1/LS2 Water Pump Impeller Separation

Inspect coolant colour and level.petrol1997–2010Cooling
CommonCooling $980–$1,960 to fix

Can't confirm for this car

The factory LS1 and LS2 water pumps use a stamped steel impeller pressed onto the pump shaft. Acidic coolant resulting from overdue coolant changes corrodes the impeller-to-shaft bond until the impeller spins freely on the shaft without driving coolant. The failure produces no external leak or audible warning in many cases; the engine overheats rapidly with no visible cause. Because the water pump turns from the accessory belt and the shaft still rotates, the failure is not apparent until the temperature gauge rises. Replacement with an aftermarket pump using a cast or billet impeller mechanically fixed to the shaft is the standard repair. Engines overheated as a result require head gasket assessment before returning to service.

Symptoms to notice

  • Engine overheating under load
  • Coolant loss or steam from engine bay

What to check

  1. Inspect coolant colour and level.
  2. Check for white exhaust smoke or sweet smell indicating coolant in combustion.
  3. If a workshop inspection is possible: Pressure test the system.

Parts involved: Water pump.

074L65E 3-4 Clutch Pack Burn-Out

Check fluid level and condition (colour, smell).petrol1997–2007Transmission
CommonTransmission $3,150–$6,300 to fix

Can't confirm for this car

The GM 4L65E four-speed automatic transmission paired with the LS1 (and some LS2 applications) suffers from premature 3-4 clutch pack failure. The clutch pack controlling the 3-4 upshift is undersized for the sustained torque output of LS V8 engines, particularly under repeated wide-open-throttle acceleration, trailer towing, or in vehicles with power modifications. Symptoms progress from a slight flare on the 3-4 shift to full slip, delayed engagement, and eventual loss of drive in 3rd and 4th gears. Modified examples exceeding approximately 350 kW at the wheels also risk sunshell fracture, which deposits gear debris throughout the transmission and mandates complete replacement rather than rebuild. A heavy-duty rebuild with upgraded clutch pack, Sonnax sunshell, and upgraded valve body is the standard repair.

Symptoms to notice

  • Transmission slipping between gears
  • Harsh or delayed gear changes

What to check

  1. Check fluid level and condition (colour, smell).
  2. Test shift quality through all gears.
  3. Look for slipping, delay or harsh engagement.

Parts involved: Clutch.

08T56 Third and Fourth Gear Synchro Ring Failure

Check fluid level and condition (colour, smell).petrol1997–2007Transmission
CommonTransmission $2,800–$5,600 to fix

Can't confirm for this car

The Tremec T56 6-speed manual fitted to manual-equipped LS1 and LS2 models exhibits premature brass synchro ring wear primarily in third gear, and to a lesser extent fourth. The condition manifests as grinding or blocking on upshifts into third, most noticeable when cold or when shifts are performed quickly. Contributing factors include clutch-less or aggressive shifting, modified drivelines that deliver higher torque loads to the transmission, and deteriorated transmission fluid that has not been serviced. The synchro rings themselves are the consumable component but the repair requires full gearbox removal regardless of whether only synchros are replaced or a complete rebuild is undertaken. High-mileage examples are best addressed with a full rebuild including replacement of the input shaft bearing, shift forks, and all synchro components.

Symptoms to notice

  • Harsh or delayed gear changes
  • Transmission fluid leak

What to check

  1. Check fluid level and condition (colour, smell).
  2. Test shift quality through all gears.
  3. Look for slipping, delay or harsh engagement.

Parts involved: Clutch.

Electrical2

01VT-VY BCM to PCM Class 2 Serial Data Bus Failure

Scan ECU for stored and pending fault codes.petrol1997–2005Electrical
CommonElectrical $1,400–$2,800 to fix

Can't confirm for this car

The VT, VX, and VY Commodore and WH/WK Statesman platforms use a Class 2 serial data bus to carry communications between the Body Control Module (BCM), Powertrain Control Module (PCM), instrument cluster, and ancillary modules. Pin corrosion at the underbonnet PCM connector, the BCM connector behind the glovebox, and the data bus junction splices in the main harness disrupts this communication. Symptoms include intermittent or permanent no-start conditions with no fault codes, multiple simultaneous fault codes spread across unrelated modules, disabled cruise control and traction control, and non-functional instruments. The failure is compounded in vehicles with underbonnet water ingress or poorly executed aftermarket wiring. Diagnosis requires scan-tool monitoring of bus voltage levels; repair is connector pin cleaning, terminal replacement, or full harness splice repair. PCM failure (rare but confirmed) requires a model-specific replacement unit.

Symptoms to notice

  • Difficult starting or battery drain
  • Fault codes stored in ECU

What to check

  1. Scan ECU for stored and pending fault codes.
  2. Test all electronic functions.
  3. Check battery voltage and alternator output.

Parts involved: Body corrosion.

02Crank angle sensor cracks with heat - stalls hot, restarts only once cool (3.8 V6)

This one is about the test drive, not the driveway.petrol1988–2004ElectricalRead the full fault: symptoms, where to look, what to ask the seller
Body, brakes, suspension & interior1

01Sunroof glass can come loose while driving recall (VY Commodore with factory sunroof, 2002-2004)

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2011/12317 was done.2002–2004Body & Rust
CommonBody & Rust $0 to fix

Can't confirm for this car

VY Commodores built 2002 to 2004 with a factory-fitted sunroof were recalled (PRA 2011/12317) because the glass panel bonding could fail and the glass could separate from its frame while the car is moving. Cars without a sunroof are not affected. The fix was free at a Holden dealer.

Symptoms to notice

  • Sunroof glass loose or rattling
  • Gap or lifted edge around the glass

What to check

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2011/12317 was done. Give the VIN to a Holden or GM service agent and ask them to check for open recalls before paying. If the car has a sunroof, look closely at the edge of the glass for lifting or gaps and press gently on the panel to feel for movement. If a workshop inspection is possible: a Holden or GM service agent can confirm from the VIN whether the recall work was completed.

Where to look: Roof, sunroof glass panel

Ask the seller

  • “Has the sunroof glass recall been done?”
Fluid leaks1

01Rear main seal weeps oil where the crank leaves the back of the 3.8 V6

Almost every high-kilometre Commodore V6 of this era leaks from the rear main seal at the back of the block.petrol1988–2004Fluid Leaks
Very commonFluid Leaks $900–$1,900 to fix

Can't confirm for this car

Almost every high-kilometre Commodore V6 of this era leaks from the rear main seal at the back of the block. The seal hardens and the crankshaft journal wears a groove in it, which is why a replaced seal often starts weeping again within a year or two - owners on the Commodore forums report doing the job more than once on the same car. The gearbox has to come out to reach it, so a cheap part becomes an expensive job, and it always leaks worse in hot weather. A slow weep is mostly a nuisance, but oil that reaches a manual clutch will make it slip, and a heavy drip fails a warrant of fitness.

Symptoms to notice

  • Oil drips on the driveway under the middle of the car rather than the front
  • Wet oily film on the bellhousing where the engine meets the gearbox
  • Burning oil smell after a long drive
  • Oil level falling with no smoke from the exhaust
  • Clutch slipping on a manual car

What to check

  1. Look at the ground where the car has been parked before it gets moved, and note whether the drips sit near the front of the engine or back under the middle of the car.
  2. With the bonnet up, shine your phone torch down the back of the engine towards the firewall and look for a wet oily film running down the join between the engine and the gearbox, and be suspicious of a freshly steam-cleaned engine bay on a thirty-year-old car.
  3. Look at the exhaust pipe under that area for oil baked onto it.
  4. Check the oil level and ask the seller how much oil it uses.
  5. Ask whether the rear main seal has ever been done and how long ago, because a repeat leak on a grooved crank is common.
  6. On a manual, take it up a hill in a high gear and feel whether the revs flare without the car speeding up.
  7. If a workshop inspection is possible: have the car raised on a hoist so the bellhousing drain hole can be checked for fresh oil, and have the leak traced to confirm it is the rear main seal rather than the rocker covers or the sump gasket running back.

Where to look: Back of the engine where it bolts to the gearbox - look down between the engine and the firewall, and at the ground under the middle of the car.

Parts involved: Clutch.

Ask the seller

  • “Has the rear main seal ever been replaced, and when?”
  • “How much oil does it use between services?”
  • “Was the crankshaft checked when the seal was done?”
  • “Has the clutch been replaced, and was there oil on it?”
Other Holden Commodore engines and years35 documented issues that do not apply to the one you picked.
Engine, transmission & cooling14

01LS3 Timing Chain Stretch at High Mileage

Cold-start the engine and listen carefully to the front timing cover area for rattle in the first 2 to 5 seconds.petrol2015–2017Engine
OccasionalEngine $2,400–$5,500 to fix

Does not apply

The LS3 6.2L V8 uses a single-row primary timing chain that can stretch on high-mileage examples, particularly those with infrequent oil changes or AFM-delete work using aggressive cam profiles. A worn chain produces a rattling noise on cold start from the front of the engine that typically diminishes once oil pressure builds. In severe cases, retarded cam timing causes loss of power, rough running, and illuminated check engine light with cam correlation codes. Worn plastic chain guides and tensioners can break, creating risk of catastrophic engine damage. Units with extended oil change intervals are significantly more susceptible.

The front of a dual overhead camshaft engine with the timing cover removed, exposing the timing chain and sprockets.Example of the part — not this vehicle

The front of a twin-cam engine with the timing cover off — chain, sprockets and guides.

Logansenf · CC BY-SA 4.0 · Wikimedia Commons

Symptoms to notice

  • Cold-start timing chain rattle from front of engine settling after oil pressure builds
  • Check engine light with cam timing correlation codes P0008 P0009 P0016 P0017
  • Slight power loss or rough idle at operating temperature
  • Increased rattle duration as chain wear progresses

What to check

  1. Cold-start the engine and listen carefully to the front timing cover area for rattle in the first 2 to 5 seconds.
  2. Scan the ECU for stored cam position correlation codes.
  3. Inspect oil condition on the dipstick — dark neglected oil accelerates chain and guide wear.
  4. Verify a complete service history with oil changes at the correct interval.
  5. High-km AFM-deleted cars should have cam timing specs verified by a tuner.

Where to look: Front of engine behind timing cover — primary timing chain, plastic guides, and hydraulic tensioner

Parts involved: Timing chain.

Ask the seller

  • “What is the full service history and oil change interval?”
  • “Has the timing chain ever been inspected or replaced?”
  • “Has any cam or AFM delete work been carried out?”
  • “Are there any stored or active engine fault codes?”

02Alloytec / LFX V6 3.6L Timing Chain Stretch (Secondary Left Bank)

Cold-start the engine and listen at the left front of the block for a chain rattle in the first 10-20 seconds.petrol2006–2017Engine
CommonEngine $2,200–$4,500 to fix

Does not apply

The 3.6L Alloytec (LY7) in VE and its successor LFX in VF develop stretch on the secondary timing chain on the left (driver's) bank. The plastic chain guides wear, allowing the chain to slap and jump timing. Often accompanies a front cover oil leak as the seals deteriorate under thermal cycling. A known and widely documented AU/NZ fault across both generations.

The front of a dual overhead camshaft engine with the timing cover removed, exposing the timing chain and sprockets.Example of the part — not this vehicle

The front of a twin-cam engine with the timing cover off — chain, sprockets and guides.

Logansenf · CC BY-SA 4.0 · Wikimedia Commons

Symptoms to notice

  • Rattling noise from left front of engine on cold start, clears after warm-up initially
  • Check engine light with cam/crank correlation codes (P0008, P0016, P0017)
  • Rough idle or misfires at operating temperature
  • Oil on front of engine block below valve cover

What to check

  1. Cold-start the engine and listen at the left front of the block for a chain rattle in the first 10-20 seconds.
  2. Scan for cam-correlation fault codes.
  3. Inspect the front cover and lower timing cover area for oil seepage.

Where to look: Left (driver's) side front of engine, secondary timing chain and guide assembly behind front cover

Parts involved: Timing chain.

Ask the seller

  • “Has the timing chain and guides ever been replaced?”
  • “Any cam or crank sensor fault codes logged?”
  • “Any rattling noise on cold starts?”

03ZB 2.0 turbo-diesel runs a timing belt due at 10 years or 120,000 km

This is a paperwork check first and a mechanical one second.diesel2018–2020EngineRead the full fault: symptoms, where to look, what to ask the seller

04V6 AWD Twinster rear differential noise and wear

On a V6 AWD car, drive at low speed applying and releasing throttle and listen for drumming, whine or grinding from the rear driveline.petrol2018–2020Transmission
OccasionalTransmission $250–$6,000 to fix

Does not apply

The 3.6 V6 AWD (LGX) uses a GKN Twinster twin-clutch rear drive unit rather than a conventional locking diff. On these AWD cars there are growing reports of rear-diff and driveline noise: a low drumming or whine on take-off and light throttle at low speed that can progress to a louder grinding, sometimes ending in replacement of the rear drive unit. Lack of dedicated diff-oil cooling is cited as a contributing factor, and a fluid change sometimes quietens minor noises but does not always cure it. This is specific to the V6 all-wheel-drive models, not the front-drive four-cylinders.

Symptoms to notice

  • Low drumming or whine on take-off
  • Noise when tapping the accelerator at low speed
  • Grinding from the rear on AWD models
  • Driveline vibration

What to check

On a V6 AWD car, drive at low speed applying and releasing throttle and listen for drumming, whine or grinding from the rear driveline; ask whether the rear drive unit fluid has been serviced and whether any diff/coupling work has been done.

Where to look: Rear GKN Twinster twin-clutch drive unit / rear differential (V6 AWD only)

Parts involved: Differential.

Ask the seller

  • “Is this the V6 AWD, and does it make any noise on take-off or light throttle?”
  • “Has the rear drive unit ever been serviced or replaced?”
  • “Has a driveline or diff noise ever been investigated?”

056L80 Torque Converter Shudder on Light Throttle

Test drive on a flat road holding steady 50 to 60 km/h at very light throttle to feel for judder or vibration through the floor and seat.petrol2006–2017TransmissionRead the full fault: symptoms, where to look, what to ask the seller

066L80/6L90 TCC Shudder 4th–5th Gear

Drive at 80–100 km/h on a flat road with light, steady throttle and feel for a low-frequency shudder through the seat and floor.petrol2006–2017TransmissionRead the full fault: symptoms, where to look, what to ask the seller

07V6 Timing Chain Tensioner Rattle at Startup

Cold-start the engine and listen at the front right of the engine bay for chain rattle before oil pressure builds.petrol2006–2017EngineRead the full fault: symptoms, where to look, what to ask the seller

08ZB LTG 2.0T Timing Chain Rattle on Cold Start

Cold-start the engine (not started for at least 3 hours) and immediately listen for chain rattle from the front of the engine.petrol2018–2020EngineRead the full fault: symptoms, where to look, what to ask the seller

09Diesel particulate filter (DPF) clogging and limp mode

Ask how the car is driven (short trips are a red flag), scan for stored DPF-related codes such as P2002, and check for warning messages on start-up.diesel2018–2020EngineRead the full fault: symptoms, where to look, what to ask the seller

102.0 turbo petrol oil consumption and timing chain wear

Check the oil level and condition and look for a complete on-time oil-service history.petrol2018–2020Engine
OccasionalEngine $400–$3,500 to fix

Does not apply

The 2.0-litre turbo-petrol four (GM Ecotec, shared with the Insignia B) draws occasional reports of oil consumption, timing chain wear and turbo issues, generally described as linked to missed or stretched oil-change intervals rather than an inherent design failure. As a direct-injection engine it can also accumulate intake-valve carbon over time. Reporting is lighter and less specific than for the diesel, so treat this as a servicing-dependent risk: a car with a full, on-time oil-change history is far less likely to be affected.

The front of a dual overhead camshaft engine with the timing cover removed, exposing the timing chain and sprockets.Example of the part — not this vehicle

The front of a twin-cam engine with the timing cover off — chain, sprockets and guides.

Logansenf · CC BY-SA 4.0 · Wikimedia Commons

Symptoms to notice

  • Needing to top up engine oil between services
  • Rattle on cold start-up
  • Engine or check-engine warning light
  • Rough idle or hesitation from carbon build-up

What to check

Check the oil level and condition and look for a complete on-time oil-service history; listen for a timing-chain rattle on cold start-up and ask whether oil has needed topping up between services.

Where to look: 2.0 turbo-petrol engine: timing chain (front of engine), turbocharger, intake valves

Parts involved: Timing chain, Turbocharger.

Ask the seller

  • “Does the engine use any oil between services?”
  • “Can you show a full, on-time oil-change history?”
  • “Is there any rattle on cold start-up?”

11Alloytec V6 Internal Water Pump Seal Failure

Inspect the front of the engine around the timing cover base for coolant residue, staining, or dried coolant deposits.petrol2006–2017CoolingRead the full fault: symptoms, where to look, what to ask the seller

12Carbon build-up on the intake valves of the SIDI direct-injection V6 (3.0 and 3.6)

petrol2009–2017EngineRead the full fault: symptoms, where to look, what to ask the seller

13LFX/LFW V6 Water Pump Plastic Impeller Failure

During the test drive, monitor the coolant temperature gauge closely — it should reach operating temperature and remain stable.petrol2013–2017Cooling
OccasionalCooling $600–$1,400 to fix

Does not apply

The LFX 3.6L and LFW 3.0L V6 engines use a water pump with a plastic impeller that degrades and can fracture or detach from the shaft over time. When the impeller fails it spins freely on the shaft with no pumping action, resulting in a rapid loss of coolant circulation without an immediate external coolant leak. The engine reaches operating temperature but coolant is not being moved, causing localised overheating that may not be detected immediately. Complete impeller separation can cause the engine to overheat severely within minutes of operation, risking head gasket failure or warped cylinder heads.

Symptoms to notice

  • Coolant temperature gauge rising above normal operating range, especially at idle or low speed
  • No immediate coolant leak externally but unexplained coolant level drop
  • Heater output dropping significantly while the engine temperature rises
  • Coolant boiling or steam from the reservoir when the cap is removed after overheating
  • Whining or grinding noise from the water pump area if bearing is also failing

What to check

During the test drive, monitor the coolant temperature gauge closely — it should reach operating temperature and remain stable. Any creeping of the needle above the midpoint at idle or low speed suggests inadequate coolant flow. After the drive, check the coolant reservoir for correct level and inspect the water pump area for weeping or crust deposits indicating a slow leak. Ask whether the water pump has ever been replaced, and if so at what mileage.

Where to look: Front of engine, water pump housing beneath the accessory drive belt

Parts involved: Water pump.

Ask the seller

  • “Has the water pump ever been replaced, and if so do you have a record of when it was done?”
  • “Has the car ever run hot or overheated, even briefly?”
  • “Is the coolant level stable between services, or has it needed topping up?”

14Alloytec 3.6L Coolant Crossover Pipe O-Ring Failure

Check coolant reservoir level and look for signs of repeated top-up (calcium deposits around cap).petrol2006–2017CoolingRead the full fault: symptoms, where to look, what to ask the seller
Electrical2

01VF Commodore electric power steering can lose assist: safety recall for cars built to April 2015

On the test drive, turn the wheel lock to lock while stationary and while parking: the effort should stay light and even, with no sudden heaviness.2013–2015Electrical
CommonElectrical $0 to fix

Does not apply

VF Commodores built on or before 30 April 2015, all engines, were recalled in December 2018 (PRA 2018/17201) because increased electrical resistance in a part of the electric power steering can make the system drop its assistance. When that happens the steering suddenly becomes heavy, especially at parking and low speeds, which can make the car hard to control. The fix is free at a Holden or GM dealer; the risk is a car whose recall was never done.

Symptoms to notice

  • Steering suddenly becomes heavy, mainly at low speed or when parking
  • Power steering warning message on the dash

What to check

On the test drive, turn the wheel lock to lock while stationary and while parking: the effort should stay light and even, with no sudden heaviness. Watch for any steering warning message on the dash. Ask the seller for proof the steering recall was done, or have a Holden or GM dealer check the VIN for open recalls. If a workshop inspection is possible: scan the power steering module for stored faults.

Where to look: Electric power steering unit on the steering rack

Parts involved: Steering rack.

Ask the seller

  • “Has the power steering recall been done, and is there paperwork?”
  • “Has the steering ever gone heavy or shown a warning message?”
  • “Has a dealer checked this VIN for open recalls?”

02Fuel pump and low-beam headlight relay recall (VT Series II and VX Commodore, 1999-2001)

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2001/4844 was done.1999–2001Electrical
CommonElectrical $0–$250 to fix

Does not apply

VT Series II Commodores built from June 1999 and VX Series I Commodores built before March 2001 (all engines) were recalled (PRA 2001/4844) because the current to the fuel pump relay, fuel pump connectors and low-beam headlight relay could be interrupted. Earlier VT Series I cars are not covered. That can make the engine stop and the low-beam headlights go out while driving. It applies to all engines. The fix was new relays at a Holden dealer, free of charge.

Symptoms to notice

  • Engine cuts out for no obvious reason
  • Low-beam headlights flicker or go out

What to check

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2001/4844 was done. Give the VIN to a Holden or GM service agent and ask them to check for open recalls before paying. Turn the headlights on low beam and check they stay on steadily while the engine idles and while you drive. If a workshop inspection is possible: a Holden or GM service agent can confirm from the VIN whether the recall work was completed.

Where to look: Relay and fuse box in the engine bay and the fuel pump wiring

Ask the seller

  • “Has the fuel pump relay recall been done?”
  • “Has the car ever cut out or lost its headlights?”
Body, brakes, suspension & interior10

01FE3 Sport Suspension Rear Coil Spring Fracture

Look for any cracks, fractures, or sections of spring that appear offset or misaligned.2013–2017Suspension
OccasionalSuspension $450–$1,100 to fix

Does not apply

VF Commodores equipped with the FE3 sport-tuned suspension package use stiffer rear coil springs that are particularly susceptible to stress fracture, typically at the bottom coil where it seats in the spring perch. The fracture is caused by corrosion pitting acting as a stress concentrator, combined with the higher spring rate cycling over road imperfections. A broken rear spring can puncture the tyre sidewall from inside the wheel arch, creating an immediate safety risk. Failures are more frequent on vehicles with higher mileage or those that have been operated on rough roads.

Symptoms to notice

  • Audible clunk or bang from the rear suspension over bumps or road irregularities
  • Vehicle sitting noticeably lower on one side at the rear
  • Tyre rubbing or scraping sound from inside the rear wheel arch
  • Sudden change in handling or vehicle pulling to one side
  • Visible gap or misalignment in a coil spring when inspected directly

What to check

Look for any cracks, fractures, or sections of spring that appear offset or misaligned. Also inspect the spring perch rubber isolator for deterioration. On the ground, check whether the vehicle sits level — a broken spring often causes a noticeable lean to one side. If a workshop inspection is possible: With the vehicle on a hoist or using a torch and mirror, inspect both rear coil springs at the lower coil where it sits in the perch.

Where to look: Rear suspension, coil spring lower seating coil, both sides

Parts involved: Body corrosion.

Ask the seller

  • “Have the rear springs ever been inspected or replaced, particularly if the car has sport or FE3 suspension?”
  • “Has the vehicle ever sat lower on one side at the rear, or have you heard a clunk from the rear suspension?”
  • “Was the car ever involved in a recall for rear spring fracture — has the recall work been completed?”

02Brake booster can fail - 2022 safety recall covering almost every ZB Commodore

2018–2020Brakes
OccasionalBrakes $0–$250 to fix

Does not apply

In August 2022 the manufacturer recalled 13,898 ZB Commodores built between 2017 and 2020 - the great majority of every one sold - because a manufacturing defect can cause the brake booster to fail. With the booster gone the brakes still work, but the pedal goes hard and high and the stopping distance exceeds what Australian Design Rule 31/03 allows, which on a car this heavy is a serious problem. The remedy is a free software update to the electronic brake control module at a dealer. Because Holden had already been wound up as a brand by then, plenty of owners never received or never acted on the notice, so on any used ZB you have to confirm the work was actually done rather than assume it.

Symptoms to notice

  • Brake pedal suddenly goes hard and high
  • Much heavier pedal effort needed to pull the car up
  • Longer stopping distance than the car normally has
  • Brake or ABS warning light on the dash

What to check

Write down the VIN from the base of the windscreen or the driver's door frame and check it against the manufacturer's recall lookup before you go any further, because this is the single most important check on a ZB. Ask the seller for the dealer paperwork showing the brake booster recall was completed, rather than accepting a verbal assurance. On the test drive, brake firmly from about 50 km/h in a safe clear place and feel whether the pedal is soft and progressive as it should be, or hard and high. Watch for any brake or ABS warning light appearing during the drive. Ask whether the brake pedal has ever gone hard on them or whether a brake warning light has ever come on. If a workshop inspection is possible: have a dealer confirm the electronic brake control module software level and complete any outstanding recall work before money changes hands.

Where to look: Brake booster on the firewall behind the engine, driven by the electronic brake control module - the fault shows itself through the brake pedal.

Ask the seller

  • “Has the brake booster recall been completed on this car?”
  • “Can I see the dealer paperwork for it?”
  • “Has the brake pedal ever gone hard?”
  • “Are there any other outstanding recalls against this VIN?”

03Seatbelt pretensioner wiring can wear through recall (VF Commodore, 2013-2014)

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2014/14127 was done.2013–2014Interior
CommonInterior $0 to fix

Does not apply

VF Commodores built from 8 March 2013 to 22 May 2014 were recalled (PRA 2014/14127) because the seatbelt pretensioner wiring harness could rub on a bolt and wear. A damaged harness can stop the pretensioner and airbag working in a crash. It applies to all engines. The fix was free at a Holden dealer.

Symptoms to notice

  • Airbag warning light on
  • Often no sign at all

What to check

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2014/14127 was done. Give the VIN to a Holden or GM service agent and ask them to check for open recalls before paying. Check the airbag light comes on with the ignition and then goes out. If a workshop inspection is possible: a Holden or GM service agent can confirm from the VIN whether the recall work was completed.

Where to look: Under the front seats, seatbelt pretensioner wiring

Ask the seller

  • “Has the seatbelt wiring recall been done?”

04Front seat hook bracket weld recall (VF Commodore, 2013-2014)

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2014/14226 was done.2013–2014Interior
CommonInterior $0 to fix

Does not apply

VF Commodores built from 7 February 2013 to 22 May 2014 were recalled (PRA 2014/14226) because a weld on the front seat hook bracket might be incomplete. In a crash the seat could come away from its mounting. It applies to all engines. The fix was a free inspection and repair at a Holden dealer.

Symptoms to notice

  • Front seat feels loose or rocks on its mounts
  • Usually no sign at all

What to check

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2014/14226 was done. Give the VIN to a Holden or GM service agent and ask them to check for open recalls before paying. Sit in each front seat and rock it firmly forward and back to feel for any looseness. If a workshop inspection is possible: a Holden or GM service agent can confirm from the VIN whether the recall work was completed.

Where to look: Front seat mounting brackets

Ask the seller

  • “Has the seat weld recall been done?”

05Rust under the boot seal, in the spare wheel well and around the bonded screens (VN-VS)

1988–1997Body & RustRead the full fault: symptoms, where to look, what to ask the seller

06VF Electronic Park Brake Caliper Failure

Cycle the electronic park brake apply and release several times and confirm both rear wheels spin freely afterwards.petrol2013–2017BrakesRead the full fault: symptoms, where to look, what to ask the seller

07IRS Rear Toe Link Bush and Knuckle Mount Deterioration

Grab rear wheel at 9 and 3 o'clock and check for lateral play in the knuckle mounting point.petrol2006–2017Suspension
CommonSuspension $500–$1,200 to fix

Does not apply

The VE and VF IRS rear suspension uses toe link rods with rubber-bushed end joints to control rear wheel alignment. The bushes crack and collapse with age and load, causing rear toe to wander and producing handling instability at speed. Knuckle mounting bushes also deteriorate, compounding alignment drift. A documented wear item requiring inspection on higher-mileage examples.

Symptoms to notice

  • Rear-end instability or wandering at highway speed
  • Clunking or knocking from rear over road imperfections
  • Uneven rear tyre wear across the tread face
  • Rear alignment drifts out of specification shortly after being set

What to check

Grab rear wheel at 9 and 3 o'clock and check for lateral play in the knuckle mounting point. Check rear tyre wear pattern for inner or outer scrubbing consistent with toe or camber error. If a workshop inspection is possible: On a hoist, inspect toe link end bushes for cracking or splitting of the rubber.

Where to look: Rear IRS, toe link rod end bushes and rear knuckle upper and lower mounting points

Ask the seller

  • “Has the rear suspension been checked or replaced for bush wear?”
  • “Any recent four-wheel alignment issues or premature tyre wear at the rear?”
  • “Any knocking, instability, or loose feel from the rear end?”

08Power steering cooler hose can burst recall (VY Commodore, 2002-2003)

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2004/6978 was done.2002–2003Suspension
CommonSuspension $0–$300 to fix

Does not apply

VY Commodores built from 26 August 2002 to 2 September 2003 were recalled (PRA 2004/6978) because the power steering cooler hose could rupture during cornering. That dumps power steering fluid, the steering suddenly gets heavy, and fluid can spray onto hot parts. It applies to all engines in that build window. The fix was a free replacement hose at a Holden dealer.

Symptoms to notice

  • Power steering fluid leak at the front of the car
  • Steering suddenly heavy
  • Whining from the steering pump when low on fluid

What to check

Ask the seller for the service history and look for a dealer invoice or service stamp showing recall PRA 2004/6978 was done. Give the VIN to a Holden or GM service agent and ask them to check for open recalls before paying. Look under the front of the car with a phone torch for power steering fluid drips, and turn the wheel lock to lock on the test drive listening for pump whine. If a workshop inspection is possible: a Holden or GM service agent can confirm from the VIN whether the recall work was completed.

Where to look: Power steering cooler line across the front of the engine bay

Parts involved: Steering rack.

Ask the seller

  • “Has the power steering hose recall been done?”
  • “Has the power steering ever lost fluid?”

09Recall: brake booster defect can increase stopping distance (REC-005475)

On a safe test drive, check the brakes feel normally power-assisted (not hard or wooden) and the car pulls up straight and promptly.2018–2020Brakes
OccasionalBrakes

Does not apply

On 2017-2020 Holden ZB Commodore (about 13,990 units), a brake-booster manufacturing defect can fail so that, in the un-boosted state, the pedal goes hard and stopping distance exceeds the Australian Design Rule limit. Holden's recall REC-005475 updates the Electronic Brake Control Module software free of charge. Check the brakes feel normally assisted and the recall was completed.

Symptoms to notice

  • Brake pedal suddenly hard, needing heavy effort
  • Longer stopping distance than expected
  • Brake warning message

What to check

On a safe test drive, check the brakes feel normally power-assisted (not hard or wooden) and the car pulls up straight and promptly. Ask a Holden/GM dealer whether recall REC-005475 (brake booster / EBCM software) was completed.

Where to look: Brake booster / Electronic Brake Control Module

Ask the seller

  • “Has the brake booster recall (REC-005475) been done?”
  • “Does the brake pedal ever go hard or need extra effort?”

10Recall: rear seat-frame cross-member weld defect (REC-000544)

This is a factory weld defect confirmed by VIN, not visible to a buyer.2019–2020Interior
RareInterior

Does not apply

On 2019-2020 Holden ZB Commodore, a cross-member at the base of the rear seat frame may have been improperly welded. In a rear-impact crash this increases the risk of injury to occupants. Holden's recall REC-000544 inspects the weld and replaces the seat frame if a defect is found, free of charge. This is a build defect identified by VIN, not something a buyer can see.

Symptoms to notice

  • No visible symptom — identified by VIN
  • Rear seat base occasionally feels loose

What to check

This is a factory weld defect confirmed by VIN, not visible to a buyer. Ask a Holden/GM dealer to confirm recall REC-000544 (rear seat-frame weld) was inspected or completed for this VIN.

Where to look: Cross-member at the base of the rear seat frame

Ask the seller

  • “Has the rear seat-frame weld recall (REC-000544) been completed for this VIN?”
Fluid leaks9

01Diesel fuel hose can chafe on its clip and leak onto the exhaust (2018 and 2020 recalls)

A clip holding the fuel hose bundle on the 2.0 litre turbo-diesel ZB can rub through the fuel pump return hose.diesel2018–2019Fluid Leaks
RareFluid Leaks $0–$350 to fix

Does not apply

A clip holding the fuel hose bundle on the 2.0 litre turbo-diesel ZB can rub through the fuel pump return hose. Diesel then leaks out and can drip onto the hot exhaust and ignite. A recall was issued in October 2018 for 2018 model year diesels, and a second one in January 2020 covering a further 365 cars from the 2018 and 2019 model years, for the same defect. The repair is free at a dealer, but a used ZB diesel that never went back still carries the fault, so this is a VIN and paperwork check rather than something you can reliably spot by eye.

Symptoms to notice

  • Diesel smell around the front of the car or drifting into the cabin
  • Wet diesel or a washed-clean patch low in the engine bay
  • Diesel drips on the ground after the car has been parked
  • Fuel smell that gets stronger once the engine is hot

What to check

Take the VIN from the base of the windscreen or the driver's door frame, check it against the manufacturer's recall lookup, and then ask the seller for dealer paperwork showing the fuel hose recall was completed. Open the bonnet on a cold engine and put your nose over the engine bay, because a diesel smell you can pick up with the bonnet open is worth chasing. Shine your phone torch down the back and the sides of the engine looking for a wet dark streak or a patch that looks cleaner than everything around it. After the test drive, park up, wait five minutes and look at the ground under the front of the car for fresh drips. Ask whether the car has ever smelled of fuel or been in for a fuel leak. If a workshop inspection is possible: have the car raised so the fuel hose bundle, its retaining clip and the pump return hose can be inspected directly, and have any outstanding recall completed before purchase.

Where to look: Fuel hose bundle on the engine, where a retaining clip crosses the fuel pump return hose above the exhaust.

Parts involved: Turbocharger.

Ask the seller

  • “Has the fuel hose recall been completed on this car?”
  • “Can I see the dealer paperwork for it?”
  • “Has the car ever smelled of diesel?”
  • “Are there any outstanding recalls against this VIN?”

02VE Power Steering Pump Whine & Rack Seal Leak

The VE Commodore uses a belt-driven hydraulic power steering pump feeding a rack-and-pinion steering rack via high-pressure hoses.petrol2006–2013Fluid LeaksRead the full fault: symptoms, where to look, what to ask the seller

03VF 3.6L LFX Timing Cover Cam Seal Seep

petrol2013–2017Fluid LeaksRead the full fault: symptoms, where to look, what to ask the seller

04LFX 3.6L V6 Valley Pan (Intake Valley) Gasket Oil Leak

The LFX 3.6L V6 engine uses an upper valley cover plate sealed with a gasket that sits beneath the intake manifold and covers the cam drive valley.petrol2013–2017Fluid LeaksRead the full fault: symptoms, where to look, what to ask the seller

05Rear Differential Cover Corrosion & Seal Leak

Get beneath the rear of the vehicle and inspect the rear differential cover for rust, pitting, and wet oil seepage around the cover gasket seam.petrol2006–2017Fluid LeaksRead the full fault: symptoms, where to look, what to ask the seller

06VE V8 Ute/Wagon Rear Differential Pinion Seal Leak

Inspect the front (pinion) side of the rear differential housing for oil weeping around the driveshaft yoke.petrol2006–2013Fluid Leaks
CommonFluid Leaks $350–$750 to fix

Does not apply

The rear differential on VE Commodore V8 Utes and Wagons (Calais Wagon, SS Wagon) is known for pinion seal deterioration. Seal failure allows gear oil to weep and spray onto the rear brakes and surrounding components. A leaking pinion seal can contaminate rear brake pads and rotors, creating a compounded safety issue. Common on vehicles above 120,000km.

Symptoms to notice

  • Gear oil smell from rear of vehicle
  • Oil residue on rear axle or chassis rails behind diff housing
  • Contaminated rear brake pads causing uneven braking

What to check

  1. Inspect the front (pinion) side of the rear differential housing for oil weeping around the driveshaft yoke.
  2. Check rear brake pads for oily contamination.
  3. Look for gear oil trail along underside of vehicle.

Where to look: Rear differential housing, front pinion flange and seal

Parts involved: Differential.

Ask the seller

  • “Any gear oil smell or leak from the rear differential?”
  • “When were the rear brakes last inspected?”
  • “Any differential oil service recorded?”

07Recall: 2.0 turbo-diesel fuel hose chafe can leak fuel (REC-000536)

Only relevant to the 2.0 turbo-diesel.diesel2018Fluid Leaks
RareFluid Leaks

Does not apply

On 2018 Holden ZB Commodore with the 2.0-litre turbo-diesel, a clip on the fuel-hose bundle can rub through the fuel-pump return hose, leaking diesel that could ignite if it reaches the hot exhaust. Holden's recall REC-000536 reroutes/protects the hose free of charge. Only the 2.0 turbo-diesel is affected — check for fuel smell and that the recall was completed.

Symptoms to notice

  • Diesel smell around the engine bay
  • Fuel weeping or stains near the fuel hoses
  • Only the 2.0 turbo-diesel is affected

What to check

  1. Only relevant to the 2.0 turbo-diesel.
  2. Open the bonnet and smell and look for diesel weeping around the fuel-hose bundle.
  3. Ask a Holden/GM dealer to confirm recall REC-000536 (diesel fuel hose) was completed.

Where to look: Fuel-hose bundle / fuel-pump return hose (2.0 turbo-diesel)

Parts involved: Turbocharger.

Ask the seller

  • “Is this the 2.0 turbo-diesel, and was recall REC-000536 done?”
  • “Any fuel smell or weeping around the engine?”

08VF Timing Cover & Rear Main Seal Oil Leak

VF Commodores with both the LS3 V8 and LFX V6 develop oil leaks at the timing cover gasket and rear main crankshaft seal as kilometres accumulate.petrol2013–2017Fluid Leaks
CommonFluid Leaks $600–$2,800 to fix

Does not apply

VF Commodores with both the LS3 V8 and LFX V6 develop oil leaks at the timing cover gasket and rear main crankshaft seal as kilometres accumulate. The multi-piece timing cover gasket uses sealant that hardens and shrinks over time, allowing oil to weep down the front of the block. The rear main seal also leaks on high-km VF units, typically dripping from the bellhousing area. On LS3 models the valley cover gasket and AFM solenoid O-rings are additional leak points within the same inspection circuit. Leaks are usually slow and result in oil spots on the driveway before engine damage occurs, but contamination of clutch or flywheel components and proximity to hot exhaust are concerns if ignored.

Symptoms to notice

  • Oil spots on driveway under front or rear of engine
  • Oil film or weeping around timing cover perimeter
  • Oil drip from bellhousing area between engine and gearbox
  • Low oil level on dipstick without obvious cause
  • Burning oil smell from hot engine components or exhaust

What to check

  1. Place white cardboard under the vehicle overnight and note oil drip location — front drip indicates timing cover leak, rear drip indicates rear main seal.
  2. With a torch inspect the timing cover perimeter and valley area for oil tracks.
  3. Check the bellhousing gap for accumulated oil.
  4. Confirm with the owner whether oil spots appear regularly and whether oil consumption has been noted between services.

Where to look: Front of engine at timing cover gasket and valley cover; rear of engine at crankshaft rear main seal behind the flywheel or flex plate

Parts involved: Clutch.

Ask the seller

  • “Does the car leave oil spots when parked?”
  • “Has oil consumption been noted between services?”
  • “Has any gasket or seal work been performed on the engine?”
  • “Has the timing cover been removed for water pump or timing chain work?”

09VE Power Steering Reservoir Return Hose Leak

With the engine cold, inspect the power steering reservoir body and all hose connections for cracks, fluid staining, or weeping.petrol2006–2013Fluid Leaks
CommonFluid Leaks $220–$750 to fix

Does not apply

VE Commodores with hydraulic power steering suffer from fluid leaks at the return hose fitting on the power steering reservoir. The plastic fitting on the reservoir that accepts the low-pressure return hose degrades and cracks over time, or the crimped hose end deteriorates and weeps. Early signs are a slight power steering fluid smell from the engine bay or a small puddle of reddish fluid under the front of the car. If left unaddressed, the pump can run low on fluid and sustain internal damage, and fluid contacting the hot exhaust creates a fire risk. The typical repair involves replacing the reservoir and the return hose as a pair, which is a straightforward job once diagnosed.

Symptoms to notice

  • Power steering fluid spots or puddle under front of car
  • Burning or acrid smell from engine bay when hot
  • Power steering fluid staining on engine block near reservoir
  • Low power steering fluid level requiring regular top-up
  • Slight groan or increased steering effort if reservoir runs critically low

What to check

  1. With the engine cold, inspect the power steering reservoir body and all hose connections for cracks, fluid staining, or weeping.
  2. Examine the return hose fitting on the reservoir for cracks in the plastic collar.
  3. Check the high-pressure line banjo fitting at the pump and the rack inlet for additional leak points.
  4. Start the engine and turn the steering wheel slowly lock to lock while a second person observes for active drips from hose connections.

Where to look: Engine bay — power steering reservoir mounted near firewall; low-pressure return hose and plastic fitting at reservoir base

Parts involved: Steering rack.

Ask the seller

  • “Has the power steering fluid level needed topping up between services?”
  • “Has any power steering hose or reservoir replacement been done?”
  • “Are there signs of fluid staining on the engine or driveway spots?”
  • “Has the steering ever made groaning or whining noises under load?”

Holden Commodore faults in detail

Narrowed to the Holden Commodore · 2004. Each of these has its own page: the symptoms, where to look, what to ask the seller and what the repair costs. Free, no account needed.

Crank angle sensor cracks with heat - stalls hot, restarts only once cool (3.8 V6)Major · ElectricalEaton M90 supercharger snout bearings and nylon coupler wear (L67 supercharged 3.8 V6)Major · Engine

Compare the Holden Commodore

What these repairs cost on other cars

Some of the Holden Commodore’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

Buying guides that cover the Holden Commodore

Other Holden models

Holden Captiva18 documented faultsHolden Barina17 documented faultsHolden Astra16 documented faultsHolden Cruze13 documented faultsHolden Rodeo12 documented faultsHolden Colorado11 documented faults

Holden Commodore buyer questions

Is the Holden Commodore reliable?

Like any used car, it depends on the specific example and its service history. Across the 51 documented faults for the Holden Commodore, the recurring problem areas are engine, suspension, and cooling. A Holden Commodore with a full service history and no signs of the issues listed on this page can be a sound buy but each one needs to be checked individually before you commit.

What are the most common problems with a used Holden Commodore?

We've catalogued 51 known faults for the Holden Commodore, covering engine, suspension, and cooling. All 51 are written out in full on this page, with the symptoms to notice, what to inspect, and typical repair costs for each. Free to read, no account needed.

How much do repairs cost on a Holden Commodore?

Most single repairs on the Holden Commodore fall between $550–$1,900 at NZ independent-workshop rates. Some of the 51 documented faults cost less and a few cost considerably more, and no one car needs them all. Knowing which ones to look for before you view is what lets you negotiate the price down or walk away.

Should I get a pre-purchase inspection on a Holden Commodore?

Yes. A Holden Commodore inspection focused on its known weak points is the single best way to avoid an expensive mistake. KickTyres gives you a guided, model-specific inspection plus a market valuation and negotiation figure for $24.90 far less than the cost of missing one of the faults on this page.