Subaru Tribeca: common faults & what to check
Thinking about buying a used Subaru Tribeca (2005–2014) in New Zealand? We've documented 12 known faults for this model spanning suspension, engine, transmission, and electrical. Each researched and verified before it's published. The most serious issues here are rated critical. Every one is listed below with its symptoms and repair cost, and each has its own page with where to look and what to ask the seller. Free, no account needed.
Check this exact Subaru Tribeca
- Odometer history
- Money owing
- Reported stolen
- Ownership history
12
Critical
$450–$1,400
6
Which Subaru Tribeca are you looking at?
Fuel not stated
Now narrow it to the engine
Start your free check on this Subaru Tribeca
Pick the engine above first: the Tribeca came with 2, and without it the report has to show all of their faults. Pick the engine
Can't confirm for this car
Subaru Tribeca
Nothing has been narrowed yet, so nothing below is a claim about a particular car. Pick a year and an engine to see which faults apply.
Tell us the engine, or check the engine code on the car, before relying on this.
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What to look out for
Serious issue
Inspect the rubber boot for cracking or grease weeping.
Front Lower Control Arm Ball Joint Wear
The front lower control arm ball joints on the Tribeca are a known wear item that deteriorates on higher-mileage examples, particularly in vehicles used in areas with gravel roads or where the front suspension has been subjected to kerb impacts. Worn ball joints introduce vague steering, clunking over bumps, and in advanced cases create an MOE WOF rejection point due to measurable play; complete ball joint failure poses a serious safety risk as it causes immediate loss of steering control.
What you would notice
Costly issue
Drive at steady 70–80 km/h on a flat road with light throttle and note any vibration or rapid pulsing through the drivetrain or seat.
5-Speed Automatic Transmission Torque Converter Shudder
The TZ1B4ZFAAA five-speed automatic transmission paired with both Tribeca engines is subject to torque converter lock-up clutch shudder, typically occurring at light throttle between 60–90 km/h as the converter transitions in and out of lock-up. The shudder is often misdiagnosed as engine misfire and is caused by friction material degradation on the lock-up clutch lining, worsened by infrequent transmission fluid changes or the use of non-genuine ATF.
What you would notice
Costly issue
Check oil level and consumption history, watch for blue smoke, and inspect plug condition.
EZ30/EZ36 boxer-6 oil consumption
The Tribeca's EZ30 and later EZ36 flat-six engines consume oil with age through valve seals and rings, and being flat-sixes are labour-intensive to work on. Running low risks damage, so oil level history matters.
What you would notice
Costly issue
Cold-start the engine immediately and listen for chain rattle from the front of the engine.
EZ36 H6 timing chain secondary tensioner failure
The 3.6-litre EZ36 flat-six in the Tribeca uses a multi-stage timing chain with primary and secondary tensioners. The secondary tensioners are known to wear and lose preload, causing chain rattle on cold starts and in advanced cases chain guide breakage and chain jump. The same fault is documented on the Outback 3.6R of the same era which shares the drivetrain. Repair is highly labour-intensive due to the H6 packaging, requiring significant front-end disassembly.
What you would notice
Costly issue
Inspect the underside of the power steering pump body for wet or dried power steering fluid residue.
Power Steering Pump Shaft Seal Leak
The hydraulic power steering pump fitted to Tribeca models develops weeping or active leaks at the main shaft seal on higher-mileage units, resulting in power steering fluid loss onto the engine bay underside. Continued operation with low fluid causes pump whine and accelerated rack seal deterioration; if the fluid contacts hot exhaust components, a fire risk exists.
What you would notice
Costly issue
Drive at 80-100 km/h on a smooth road and gently weave left and right to load and unload each front bearing.
Front and Rear Wheel Bearing Failure
The B9/WX Tribeca, being a heavier AWD SUV, places significant load on its wheel bearings and is documented for front wheel bearing failure as the most common presentation, with rear bearings also wearing in high-mileage examples. Front bearing failure typically presents as a roaring noise that worsens when turning in one direction at highway speed. The Tribeca's weight and AWD system accelerate bearing wear compared to lighter Subaru models. Replacement requires a hub puller and bearing press, making it a workshop-only job.
What you would notice
Subaru Tribeca service schedule
First Generation (Facelift) · 2008–2014 · 3.6L (EZ36D) - 5-speed Automatic
Due by distance
- 100,000 km
Suspension bushings and struts can begin to feel a bit tired around this distance.
- 150,000 km
Check whether the alternator and water pump have been renewed, for peace of mind.
- 200,000 km
Confirm the spark plugs were replaced on schedule, as reaching them on the EZ36 engine takes patience.
First Generation (Pre-facelift) · 2005–2007 · 3.0L (EZ30D) - 5-speed Automatic
Due by distance
- 150,000 km
Suspension bushings and struts usually need renewing here to keep that smooth Subaru ride.
- 200,000 km
Check the cooling parts such as the radiator and hoses so overheating never becomes an issue.
- 250,000 km
Make sure the spark plugs have been dealt with, since getting to them on the flat-six is a long job.
See all 12 documented issues
Depends on which engine this Subaru Tribeca has — 12
Engine, transmission & cooling
01EZ30 head gasket seepage
Can't confirm for this car
Can't confirm for this car
The EZ30 flat-six can develop head gasket seepage with age, showing external oil/coolant weep at the head-block join, and given the engine's complexity repairs are costly. Less common than four-cylinder Subaru HG issues but present.
Example of the part — not this vehicleA used multi-layer head gasket. Discolouration between a cylinder and a water gallery is the tell.
Symptoms to notice
What to check
Ask the seller
025-Speed Automatic Transmission Torque Converter Shudder
Can't confirm for this car
Can't confirm for this car
The TZ1B4ZFAAA five-speed automatic transmission paired with both Tribeca engines is subject to torque converter lock-up clutch shudder, typically occurring at light throttle between 60–90 km/h as the converter transitions in and out of lock-up. The shudder is often misdiagnosed as engine misfire and is caused by friction material degradation on the lock-up clutch lining, worsened by infrequent transmission fluid changes or the use of non-genuine ATF.
Example of the part — not this vehicleA torque converter, sectioned. The lock-up clutch inside is what shudders.
Symptoms to notice
What to check
Ask the seller
03EZ30/EZ36 boxer-6 oil consumption
Can't confirm for this car
Can't confirm for this car
The Tribeca's EZ30 and later EZ36 flat-six engines consume oil with age through valve seals and rings, and being flat-sixes are labour-intensive to work on. Running low risks damage, so oil level history matters.
Symptoms to notice
What to check
Ask the seller
04EZ36 H6 timing chain secondary tensioner failure
Can't confirm for this car05Rear Differential Bearing Noise and Wear
Can't confirm for this car
Can't confirm for this car
The Tribeca's rear differential carrier bearings and pinion bearings are subject to wear on higher-mileage vehicles, particularly where differential fluid changes have been neglected or where the vehicle has been used for towing near its rated capacity. Bearing wear produces a characteristic howl or rumble that varies with vehicle speed and is often confused initially with tyre noise; left unaddressed it progresses to differential case damage requiring full unit replacement.
Symptoms to notice
What to check
Ask the seller
06Power Steering Pump Shaft Seal Leak
Can't confirm for this car
Can't confirm for this car
The hydraulic power steering pump fitted to Tribeca models develops weeping or active leaks at the main shaft seal on higher-mileage units, resulting in power steering fluid loss onto the engine bay underside. Continued operation with low fluid causes pump whine and accelerated rack seal deterioration; if the fluid contacts hot exhaust components, a fire risk exists.
Symptoms to notice
What to check
Ask the seller
07Timing chain guide wear on flat-six
Can't confirm for this car
Can't confirm for this car
The EZ-series flat-sixes use timing chains whose guides and tensioners wear on higher-km examples, giving a rattle and eventually risking timing issues. The engine's complexity makes this an expensive repair.
Example of the part — not this vehicleThe front of a twin-cam engine with the timing cover off — chain, sprockets and guides.
Symptoms to notice
What to check
Ask the seller
Electrical
01Air Conditioning Compressor Clutch Failure
Can't confirm for this car
Can't confirm for this car
The Denso air conditioning compressor fitted to the Tribeca is subject to clutch engagement failure, where the electromagnetic clutch coil or clutch plate wears to the point that the compressor shaft no longer engages reliably. This results in intermittent or total loss of cooling; in some cases the clutch plate seizes partially, causing a continuous squeal and belt wear. Clutch failure can occur independently of the compressor internals, allowing clutch-only replacement in many cases.
Symptoms to notice
What to check
Ask the seller
Body, brakes, suspension & interior
01Front Lower Control Arm Ball Joint Wear
Can't confirm for this car
Can't confirm for this car
The front lower control arm ball joints on the Tribeca are a known wear item that deteriorates on higher-mileage examples, particularly in vehicles used in areas with gravel roads or where the front suspension has been subjected to kerb impacts. Worn ball joints introduce vague steering, clunking over bumps, and in advanced cases create an MOE WOF rejection point due to measurable play; complete ball joint failure poses a serious safety risk as it causes immediate loss of steering control.
Example of the part — not this vehicleA separated lower ball joint: the control arm has dropped and the wheel has splayed out under the guard.
Symptoms to notice
What to check
Ask the seller
02Front and Rear Wheel Bearing Failure
Can't confirm for this car
Can't confirm for this car
The B9/WX Tribeca, being a heavier AWD SUV, places significant load on its wheel bearings and is documented for front wheel bearing failure as the most common presentation, with rear bearings also wearing in high-mileage examples. Front bearing failure typically presents as a roaring noise that worsens when turning in one direction at highway speed. The Tribeca's weight and AWD system accelerate bearing wear compared to lighter Subaru models. Replacement requires a hub puller and bearing press, making it a workshop-only job.
Symptoms to notice
What to check
Ask the seller
Fluid leaks
01Rear differential and driveline seal leaks
Can't confirm for this car
Can't confirm for this car
The AWD Tribeca develops rear differential pinion and axle seal leaks with age, weeping gear oil and, if neglected, risking diff wear. A common driveline check on higher-km AWD Subarus.
Symptoms to notice
What to check
Ask the seller
02Rear differential oil seal leak
Can't confirm for this car
Can't confirm for this car
The rear differential on Tribeca models leaks at the pinion seal and side output shaft seals, particularly on higher-mileage vehicles. Seal degradation is accelerated by infrequent differential oil changes and heat cycling. A leaking rear differential left unaddressed can cause differential overheating and eventual ring-and-pinion failure if fluid drops critically low. Seal replacement is straightforward but differential oil must be changed at the same time.
Symptoms to notice
What to check
Ask the seller
Subaru Tribeca faults in detail
What these repairs cost on other cars
Some of the Subaru Tribeca’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.
Other Subaru models
Subaru Tribeca buyer questions
Is the Subaru Tribeca reliable?
Like any used car, it depends on the specific example and its service history. Across the 12 documented faults for the Subaru Tribeca, the recurring problem areas are suspension, engine, and transmission. A Subaru Tribeca 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 Subaru Tribeca?
We've catalogued 12 known faults for the Subaru Tribeca, covering suspension, engine, and transmission. All 12 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 Subaru Tribeca?
Most single repairs on the Subaru Tribeca fall between $450–$1,400 at NZ independent-workshop rates. Some of the 12 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 Subaru Tribeca?
Yes. A Subaru Tribeca 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.