One problem related to other fuel system tank mounting has been reported for the 2012 Volkswagen Jetta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Volkswagen Jetta based on all problems reported for the 2012 Jetta.
With no prior indication, the engine glow plug light began flashing while driving on the highway. Within few minutes, the engine light came on and car started to loose power. Engine noise pitch changed, and was able to pull the car of the main freeway and barely made it to the dealership. As soon as we made it to the dealer parking lot, the engine cut off. Diagnostic of the car showed that the car suffered a catastrophic hpfp failure which caused debris contamination throughout the entire fuel system. 4 days later, the engine had its hpfp, fuel lines, injectors, and auxiliary pump replaced. Fuel tank was flushed and cleaned out from debris. Cost under warranty was $5500. The dealer said that they've had 50 cars exhibiting similar conditions. Cause of the failure is under investigation by vw. As owners, we have no clues what to do or when this will re-occur again which does not give me ant sense of confidence. I always fill at the same chevron station so it is not the quality of the diesel.