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Volkswagen Jetta TDI Problems

RepairPal has identified the most common problems with the Volkswagen Jetta TDI based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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22
Known Problems

The driver door wiring loom cracks and degrades with time due to weathering and frequent opening and closing of the door. This problem affects the normal operation of all electronic components of the door including, but not limited to:

-Electric Windows

-Electric Door Locks

-Trunk Release

-Fuel Filler Door Release

-Speakers

-Interior Lights Stay On at All Times

-Keyless Locks

-Power Side Mirrors

-Alarm

The correction for this issue is to replace the driver side door wiring harness. For security purposes, the doors can be locked with the key. The interior lights should be shut of manually, and through the multi function display in the gauge cluster to prevent battery drain.

The 2009-2012 Volkswagen Jetta 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 Jetta 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.   

Electrical issues that are difficult to diagnose—and sometimes intermittent—are typically due to ground wiring issues. The most troublesome ground locations are under the battery or at the engine.

The rear brakes tend to wear out quickly; rotors may need replacement by the first brake job. Our technicians recommend that the brakes be inspected for wear regularly.

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

Heater core leaks are common in this model, more so if the wrong anti-freeze/coolant is used in the cooling system.