Two problems related to alternator/generator/regulator 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.
Car wont start after you shut it off. Replaced the battery twice and the alternator three times in three days. No charge from the alternator to the battery. Had it tested the battery is good but still showing a bad alternator. Replaced all the fuses as well. Diagnostic is telling us nothing except the alternator isn't charging the battery. Car has been sitting for two weeks because I'm tired of paying people to look at the car and cant figure out whats wrong with it. I'm afraid to let my daughter drive it because she is pregnant and I don't want her stranded on the road or the car cut off on the highway and she get seriously hurt.
I was driving at about 45 miles an hour and the vehicle suddenly lost power steering and all power. Without power steering it was difficult to get all the way over to the side of the road. The vehicle was towed by roadside assistance and to the nearest vw dealership who evaluated the problem. The dealership indicated that the main fuse had melted and blown out the entire fuse box and the alternator cable had melted. The repair invoice indicates: "found alternator cable at fuse box melted, replaced fuse panel, alternator cable and fuse on front of fuse panel. Replaced wiring harness. Tested battery and charging system and road tested car. " I believe this is a fire hazard.