Two problems related to timing tensioner have 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.
2012 Volkswagen Jetta gli 2. 0 turbo engine. The vehicle while in motion was misfiring causing speed reduction without notice, running rough while at an idle and would rattle under load ascending a hill. Dealership service member said the tensioner chain was about to snap at only 80,000 miles on the car. Continued to report if the tensioner chain snapped, the engine would die immediately. This could be a major issue with highway driving and the car unexpectedly stopped accelerating, these parts should last more than 120,000 miles, if not, the life of a vehicle. I consider myself lucky to notice the problem before it became a bigger and costlier issue.
My 2012 Jetta gli timing chain tensioner failed, luckily mine failed at as I started up my car in morning, because it happened while I was on the road not only would it have caused more damage to my engine, but it would have caused some accidents. After having my vehicle diagnosed on what caused my engine to breakdown I learned that it was caused by a faulty timing chain tensioner, a known issue that vw has refused to aknolowedge but if yo9u speak to any mechanic that has delt with vw and Audi they will tell you that is a well known issue.