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Mercedes-Benz2000–2018 Critical issues documented

Mercedes-Benz Sprinter W906: common faults & what to check

The W906 is the Mercedes-Benz Sprinter built 2006–2018. It was sold here with the 2.1 diesel and 3.0 V6 diesel. Of the 15 faults documented for the Sprinter, 6 apply to this generation, each with its symptoms, what to inspect and a typical repair cost. Free, no account needed.

Check this exact Mercedes-Benz Sprinter

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

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15

Documented faults

Critical

Most serious

$1,000–$3,800

Typical repair

6

Systems covered

You're looking at the W906

2 engine variants are documented for this generation. Pick yours to narrow further, or keep reading for the generation as a whole.

Choose a different generation

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.

A 2007 Mercedes-Benz Sprinter is the W906 generation (2006 to 2018).

Start your free check on this Mercedes-Benz Sprinter

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Mercedes-Benz Sprinter W906Engine not picked yet

Pick the engine above first: the Sprinter came with 2, and without it the report has to show all of their faults. Pick the engine

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Can't confirm for this car

Mercedes-Benz Sprinter · 2007

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 Mercedes-Benz Sprinter before you hand over any money. Every documented fault is listed below, each with its own page.

  • Costly issue

    Spin each wheel by hand and listen for roughness or grinding.

    See why

    Front wheel bearing premature failure under load

    The W906 Sprinter front hub bearing assemblies are rated for moderate commercial loading but fail significantly earlier than expected when the vehicle is operated at or near its gross vehicle mass rating continuously, which is standard practice for tradespeople and courier operators in NZ/AU. The bearings use a double-row angular-contact design pressed into the steering knuckle. Under sustained high-load operation, inadequate bearing preload combined with the alloy knuckle allows fretting and false brinelling of the bearing races. Failure progresses from an intermittent hum at road speed to a pronounced growl, and if ignored the bearing retainer can collapse causing sudden loss of steering control. On-road life in loaded commercial use commonly falls between 60,000 and 100,000 km versus the nominal 150,000 km design life.

    What you would notice

    • Rumbling or growling noise from the front end that changes pitch with road speed
    • Noise changes character when weight transfers left or right through corners
    • Steering wheel vibration at highway speeds
    • Detectable play when the wheel is rocked at the 12 and 6 o'clock positions on a hoist

    Typically $380–$850 to put right.

See all 6 issues for this oneDocumented for the exact year and engine you picked, including 1 rated critical.
Body, brakes, suspension & interior1 critical2

01Severe body rust — wheel arches, sills, doors, step wells and floor

diesel2000–2018Body & RustRead the full fault: symptoms, where to look, what to ask the seller

02Front wheel bearing premature failure under load

Spin each wheel by hand and listen for roughness or grinding.diesel2006–2018SuspensionRead the full fault: symptoms, where to look, what to ask the seller
Depends on the exact engine — 4 moreDocumented for a specific engine we could not confirm from what you picked. Check the engine code on the car.
Engine, transmission & cooling3

01EGR cooler matrix crack and coolant ingestion

Check coolant reservoir level against service records.diesel2006–2018Cooling
CommonCooling $1,400–$3,800 to fix

Can't confirm for this car

The EGR cooler on both the OM646 and OM651 engines routes hot exhaust gas through an aluminium matrix cooled by engine coolant. Repeated thermal cycling between cold-start and full operating temperature causes the matrix to develop micro-cracks, particularly at the end-plate brazed joints. Coolant then leaks internally into the exhaust recirculation stream and enters the intake manifold as steam or liquid. This contaminates the intake tract, fouls the EGR valve and intake manifold with a white oily sludge, and in advanced cases delivers liquid coolant directly into the combustion chambers causing hydraulic lock or accelerated bore wash and bearing failure. The failure is accelerated in NZ/AU urban commercial use where the van is repeatedly cold-started for short runs, exactly the pattern that maximises thermal fatigue on the matrix.

Symptoms to notice

  • White or grey steam from exhaust on warm days when not expected
  • Unexplained coolant loss with no visible external leak
  • White oily residue inside the intake manifold or around the EGR valve
  • Engine runs rough after cold start with white smoke
  • Coolant reservoir level drops between services with no obvious cause

What to check

  1. Check coolant reservoir level against service records.
  2. Inspect the EGR valve body for sludge buildup consistent with coolant contamination.
  3. If a workshop inspection is possible: Pressure-test the cooling system with the engine cold — leak-down on an otherwise dry engine suggests internal EGR cooler seepage.
  4. Remove the EGR cooler inlet hose and inspect for white chalky residue or oily deposit inside the intake tract.

Where to look: EGR cooler mounted on the left side of the engine block, connected between the exhaust manifold and EGR valve

Parts involved: EGR valve.

Ask the seller

  • “Has the EGR cooler ever been replaced or pressure-tested?”
  • “Has the coolant level needed topping up between scheduled services?”
  • “Is there any history of white smoke from the exhaust when fully warmed up?”
  • “Has the intake manifold or EGR valve been cleaned recently — and why?”

02Diesel Particulate Filter Premature Blockage

Check engine oil level and smell dipstick for diesel contamination — elevated oil level indicates soot bypassing into oil.diesel2006–2018EngineRead the full fault: symptoms, where to look, what to ask the seller

03Injector seat leaks — 'black death' carbon build-up

Remove or look under the engine cover and inspect every injector base with a torch — any black volcano-like crust means active leakage.diesel2000–2018EngineRead the full fault: symptoms, where to look, what to ask the seller
Fluid leaks1

01OM642 V6 oil cooler seal leaks (and swirl-flap/turbo oil leaks)

Look and smell under the bonnet after the test drive — hot oil odour from the vee area is the tell.diesel2006–2018Fluid Leaks
Very commonFluid Leaks $2,000–$4,000 to fix

Can't confirm for this car

The 3.0 V6 OM642 in NCV3 Sprinters leaks oil from the oil cooler seals buried in the engine's vee — a notorious, labour-heavy job because the intake and turbo must come off to reach two cheap purple seals. Oil pools in the vee, drips onto the exhaust and can smoke or smell. Related leaks from the turbo oil lines and rear main are also common at high mileage.

Symptoms to notice

  • Oil drips under the middle of the engine
  • Hot-oil smell after driving
  • Oil pooled in the engine vee under the intake
  • Blue smoke from the engine bay

What to check

  1. Look and smell under the bonnet after the test drive — hot oil odour from the vee area is the tell.
  2. Check the ground where the van is normally parked, and the undertray/bell-housing area for wet oil.
  3. An invoice showing oil cooler seals already done (Viton upgrade) is worth real money.

Where to look: Centre of the engine vee, beneath the intake manifold; drips appear mid-engine underneath

Parts involved: Intake manifold, Turbocharger.

Ask the seller

  • “Have the oil cooler seals been replaced with the updated Viton ones?”
  • “Where does the oil on the driveway come from?”
Other Mercedes-Benz Sprinter engines and years9 documented issues that do not apply to the one you picked.
Engine, transmission & cooling7

01OM651 balance shaft oil pump drive chain failure

Request full service history showing oil change intervals under 10,000 km.diesel2009–2018Engine
Very commonEngine $9,500–$22,000 to fix

Does not apply

The OM651 2.2 CDI uses a balance shaft module mounted low on the engine block whose integrated chain-and-gear assembly also drives the oil pump. The timing chain tensioner for this sub-chain is prone to losing hydraulic pressure at idle after high-mileage thermal cycling, and the plastic guide rails fracture. Once the drive chain skips or snaps the oil pump stops instantly, oil pressure drops to zero within seconds, and the crankshaft bearings, big-end bearings, and camshafts suffer catastrophic seizure damage before the driver can react to the warning lamp. The failure is exacerbated by infrequent oil changes, low-quality oil, and the high mechanical loading typical of loaded Sprinter van use. Mercedes-Benz acknowledged the defect and issued an extended warranty in some markets but not universally, and many NZ/AU owners discovered the fault well outside any support window.

Symptoms to notice

  • Oil pressure warning lamp illuminates suddenly at idle or low speed
  • Loud mechanical knock from lower engine immediately before failure
  • Engine cuts out with no warning while driving
  • Low oil pressure audible ticking that escalates rapidly
  • Complete engine seizure with no restart

What to check

  1. Request full service history showing oil change intervals under 10,000 km.
  2. Pull the oil filler cap and listen for rattling at idle with engine warm.
  3. Check for any prior oil pressure codes with a Mercedes-compatible scanner.
  4. Ask specifically whether the balance shaft module has been replaced or upgraded.
  5. On high-mileage examples above 180,000 km treat replacement as mandatory pre-purchase work.

Where to look: Lower front of engine block, balance shaft module behind the front cover plate

Parts involved: Timing chain.

Ask the seller

  • “Has the balance shaft module or oil pump drive chain ever been replaced?”
  • “Can you show me every oil service invoice — what oil grade and what change interval was used?”
  • “Has the vehicle ever shown an oil pressure warning light, even briefly?”
  • “Is there any history of engine noise described as ticking or rattling at idle?”

02OM651 Bosch CP4 Fuel Pump Metal Debris Contamination

Ask the owner about any history of hard starting, sudden power loss, or fuel system component replacements.diesel2010–2018EngineRead the full fault: symptoms, where to look, what to ask the seller

03OM651 Rear-Mounted Timing Chain Failure

Start engine from cold and listen specifically for a rattling or slapping sound from the rear of the engine bay near the firewall.diesel2010–2018EngineRead the full fault: symptoms, where to look, what to ask the seller

04DPF regeneration problems on short-trip/camper VS30s

Ask about usage pattern; scan soot/ash levels pre-purchase if possible.diesel2018 onwardEngine
CommonEngine $500–$4,000 to fix

Does not apply

Like the NCV3, the Euro 6 VS30 needs regular sustained running to regenerate its DPF. Camper and urban-delivery use leads to interrupted regens, soot overload, limp mode and eventually a DPF clean or replacement. Combined with the AdBlue system it makes drivetrain warnings the dominant VS30 complaint.

Symptoms to notice

  • DPF warning light
  • Fan running loudly with hot smell (regen) very frequently
  • Limp mode
  • Rising oil level from failed regens

What to check

  1. Ask about usage pattern; scan soot/ash levels pre-purchase if possible.
  2. Check the oil level is not over max (diesel dilution from interrupted regens).
  3. Confirm no emissions warnings during a 30+ minute test drive including open-road speeds.

Where to look: DPF in the exhaust under the van

Parts involved: Diesel particulate filter.

Ask the seller

  • “How often does it do a long open-road run?”
  • “Any DPF cleans or replacements?”

05OM642 3.0 V6 EGR Cooler Internal Cracking

diesel2010–2018EngineRead the full fault: symptoms, where to look, what to ask the seller

06VS30 AdBlue/SCR system faults — NOx sensors, pump and crystallisation

Check the dash for any AdBlue/emissions messages and confirm the countdown is not active.diesel2018 onwardEngineRead the full fault: symptoms, where to look, what to ask the seller

07T1N limp-home mode — split turbo hoses, EGR and turbo actuator faults

Squeeze the large intercooler hoses feeling for softness, splits or oiliness.diesel2000–2006Engine
CommonEngine $200–$2,500 to fix

Does not apply

The 2000-2006 T1N Sprinter is famous for intermittent 'limp home mode': the van suddenly loses boost and crawls until restarted. Usual culprits are split or oil-soaked intercooler/turbo hoses, a sticking EGR valve, or the turbo resonator/actuator. Cheap fixes individually, but a van that repeatedly limps needs proper diagnosis, and worn turbos on high-mileage vans are a bigger bill.

Symptoms to notice

  • Sudden loss of power that clears after ignition off/on
  • Whooshing/hissing under boost
  • Oil film around intercooler hoses
  • Black smoke under load

What to check

Squeeze the large intercooler hoses feeling for softness, splits or oiliness. On the test drive, hold full throttle up a hill for a sustained period — a limp event (power drops, no boost) confirms the fault. Check for boost-leak whistle.

Where to look: Turbo and intercooler plumbing across the front of the engine bay

Parts involved: Turbocharger, EGR valve.

Ask the seller

  • “Does it ever go into limp mode / lose power until restarted?”
  • “Have the turbo hoses or EGR been replaced?”
Electrical1

01Crankshaft position sensor failure — stalling and no-restart

Take a long test drive including a hot restart after 10 minutes parked.diesel2018 onwardElectrical
OccasionalElectrical $250–$800 to fix

Does not apply

VS30 Sprinters (OM654/OM651 era) have a documented pattern of crankshaft position sensor failures: the van stalls or cranks without starting, often intermittently when hot, before the sensor dies completely. The part is cheap but the failure strands the vehicle, and intermittent cases are frequently misdiagnosed.

Symptoms to notice

  • Intermittent stall while driving
  • Long cranking or no-start when hot, starts when cooled
  • No tacho signal while cranking

What to check

  1. Take a long test drive including a hot restart after 10 minutes parked.
  2. Ask whether it has ever stalled or failed to start; check service records for a crank sensor replacement.

Where to look: Sensor on the engine block/bellhousing area reading the crankshaft

Ask the seller

  • “Has it ever stalled or refused to hot-start?”
  • “Has the crankshaft sensor been replaced?”
Fluid leaks1

01OM642 3.0 V6 Oil Cooler Seal Degradation

Check coolant expansion tank for an oil film on the surface.diesel2010–2018Fluid LeaksRead the full fault: symptoms, where to look, what to ask the seller

Mercedes-Benz Sprinter faults in detail

Narrowed to the Mercedes-Benz Sprinter · 2007. 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.

Diesel Particulate Filter Premature BlockageMajor · EngineFront wheel bearing premature failure under loadMajor · SuspensionInjector seat leaks — 'black death' carbon build-upMajor · EngineSevere body rust — wheel arches, sills, doors, step wells and floorCritical · Body & Rust

What these repairs cost on other cars

Some of the Mercedes-Benz Sprinter’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

Other Mercedes-Benz models

Mercedes-Benz C-Class41 documented faultsMercedes-Benz A-Class23 documented faultsMercedes-Benz E-Class23 documented faultsMercedes-Benz V-Class11 documented faultsMercedes-Benz CLA10 documented faultsMercedes-Benz GLS10 documented faults

Mercedes-Benz Sprinter buyer questions

Is the Mercedes-Benz Sprinter reliable?

Like any used car, it depends on the specific example and its service history. Across the 15 documented faults for the Mercedes-Benz Sprinter, the recurring problem areas are engine, body & rust, and fluid leaks. A Mercedes-Benz Sprinter 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 Mercedes-Benz Sprinter?

We've catalogued 15 known faults for the Mercedes-Benz Sprinter, covering engine, body & rust, and fluid leaks. All 15 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 Mercedes-Benz Sprinter?

Most single repairs on the Mercedes-Benz Sprinter fall between $1,000–$3,800 at NZ independent-workshop rates. Some of the 15 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 Mercedes-Benz Sprinter?

Yes. A Mercedes-Benz Sprinter 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.