2012 Volkswagen Passat TDI Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2012 Volkswagen Passat TDI

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2012 Volkswagen Passat TDI Problems

The Mechanical Fuel Pump May Fail Unexpectedly

The 2009-2012 Volkswagen Passat TDI 2.0L engine is equipped with a mechanical high pressure fuel pump (HPFP) which delivers highly pressurized fuel needed to run the clean diesel engine. This pump is know to fail at random in both new and used 2012 Passat TDI models leaving the vehicle running very roughly, with very little power, unable to start, and/or OBD code P0087  

The most common causes of failure are fueling with gasoline or biofuel, and a factory defect in the HPFP. 

When the HPFP fails, it sends fragments of metal through the entire fuel system, necessitating replacement of every component, with exception of the gas tank. 

To help prevent this issue, ensure you are using only diesel fuel, and highly trafficked gas stations.

Additionally, Volkswagen has issued an extended warranty of 10 years/120,000 miles for this condition on select vehicles.   

Vehicles Using Biofuels May Have Injection Pump Failures

Cars using biofuel typically have problems with injection pump failures; symptoms can include a "no start" condition or external pump leaks.

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2012 Volkswagen Passat TDI Recalls

Under Body Sensor Electrical Short

A sensor under the vehicle body may have improperly assembled wire seals in its electrical connector which could allow water inside and cause a short circuit. Dealers will inspect the connector and replace it as necessary free of charge to resolve the concern.

Potential Diesel Fuel Leak

Vehicles equipped with a diesel engine may have been assembled with a fuel filer that may not seal correctly. This could result in a fuel leak, increasing the risk of a fire. Dealers will replace the diesel fuel filter to correct this concern. The Volkswagen recall number is 20R7/W3.

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