Volkswagen 2.5 TDI de cinco cilindros (R5)Injectors
Leaks and play in the unit injectors on the 2.5 TDI R5
Why this rating?
Medium severity: It can leave you stranded or get worse if ignored, without destroying the engine.
Frequency common: Promobil identifies it as the main weakness of the T5's 1.9 and 2.5 diesels, and Autobild mentions leaks in the unit injector elements among the faults of the first units. There are no frequency figures.[1][2]
Symptoms
- If diesel gets into the oil, the level rises.[1]Oil level rises: other faults that cause it · Garage soon
- Smoke and poor performance from worn injectors.[3]Black smoke: other faults that cause it · Garage soon
Why it happens
Affected cars and years
Autobild places the faults on the first units and says VW corrected them in the last years of production before 2009.[2]
| Version | Years | Codes |
|---|---|---|
| 2.5 TDI 130 and 174 hp (AXD, AXE, 2003-2006) | 2003–2006 | AXDAXE |
| 2.5 TDI 130 and 174 hp with DPF (BNZ, BPC, 2006-2009) | 2006–2009 | BNZBPC |
Models fitted with the affected versions
Volkswagen
- Volkswagen Transporter T52003–2009
- Volkswagen Touareg I2003–2009
How much it costs to repair
Includes: Repair kit or replacement of unit injectors.
How we calculated it: No reliable data: there is no published price in Spain for this repair.
We have found no prices published in Spain.
Prices in Spain, including VAT. A workshop hour costs on average €38–66 at independent garages and €77–134 at dealerships in Spain, depending on the region and the brand. How we calculate costs
How to check for it before buying a used car
- Ask for the oil level and smell to be checked, and for the injector history.[1]
Parts needed
The part or kit that fixes this fault, according to the sources.
2.5 TDI unit injector[1]
Replacement of worn injectors.
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Recalls, campaigns and claims
As of 5 October 2026, we have no record of recalls, campaigns or extended manufacturer warranties for this fault. Check with an official dealer using the chassis (VIN) number: they will tell you whether the car has any outstanding campaign.
What owners say
What can you do now?
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Other 2.5 TDI R5 faults
- Critical severityFrequency: OccasionalCylinder head and blockPlasma coating flaking off the cylindersOn the 2.5 TDI the plasma layer on the cylinder walls can flake off and destroy the engine. Autobild links it to the first units and to unsuitable oils; the later ones were more reliable.
- High severityFrequency: OccasionalCylinder head and blockCamshaft and hydraulic tappet wearThe camshaft and tappets of the five-cylinder 2.5 TDI wear, especially if the oil is dirty because the filter was not changed on time. It is one of the engine's expensive faults: up to four or five figures in Germany.
- Medium severityFrequency: OccasionalClutchDual-mass flywheel wearThe dual-mass flywheel on the T5's 2.5 TDI can wear: rattling and vibrations. Torque Cars calls it an expensive repair, without giving a price.
- Low severityFrequency: OccasionalEmissions controlEGR valve clogged with carbonThe 2.5 TDI's EGR valve can clog with carbon and trigger engine management warnings. It is a common fault on the T5 diesels, but without frequency figures.
More faults with the injectors on other engines and cars
- High severityFrequency: Very frequentOM651Delphi piezo injector failure (220/250 CDI)Yes: 220 and 250 CDI models built between 2008 and 2011 had Delphi piezo injectors that were prone to failing and seizing in the cylinder head. Mercedes-Benz replaced them under warranty in 2009 and switched the 220 CDI to solenoid injectors from 2010-2011, but the 250 CDI kept them.Repair (garage): €3,600–€5,900
- High severityFrequency: CommonBMW N52 / N53N53 piezoelectric injector failureThe N53's piezoelectric direct injectors fail frequently and cause misfires, rough idle and limp mode; replacing them is expensive and they must be coded.
- High severityFrequency: CommonMZR-CDOil dilution from leaking injector seals and DPF regenerationsOn the 2.0 and 2.2 MZR-CD, injector seals that age badly and incomplete particulate filter regenerations on short journeys can let unburnt diesel into the sump, diluting the oil and leaving the engine with less lubrication.
- High severityFrequency: CommonOM642Wear and failure of the Bosch piezo injectorsThe OM642's Bosch piezo injectors can fail from around 150,000-200,000 km, especially with poor-quality diesel; they cannot be repaired, only replaced. Because it is a V engine, those on the rear bank are harder to reach, which pushes up labour costs.Repair: €4,500–€6,500
- High severityFrequency: Common2.2 CDI (OM646)Injector seal leak with carbonisation around the seatYes: the copper washer that seals each injector can harden and let combustion gases through, forming a black crust of carbon around it. It is a known fault on Mercedes CDI diesels of this era, with injectors described as fragile on both the OM611 and the OM646.
- High severityFrequency: Common2.2/2.5 dCiInjection pump or injector failureThe 2.2 dCi's common rail injectors fail fairly often on the X-Trail and Almera, with cases of seizing and leaks; on the Almera with the older YD22DDT, the documented fault is in the injection pump electronics, not the injectors.
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Sources
Every fact on this page links to its source. If you find an error, let us know.
- Kaufberatung gebrauchter VW T5 (2003-2015)Promobil · Motoring press · consulted 5 October 2026 · in German
- VW T5 4Motion Gebrauchtwagen-TestAuto Bild · Motoring press · consulted 5 October 2026 · in German
- Common VW 2.5 TDI PD Problems & IssuesTorque Cars · Technical documentation · consulted 5 October 2026