One problem related to brake antilock control unit/module has been reported for the 2003 Volkswagen Jetta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Volkswagen Jetta based on all problems reported for the 2003 Jetta.
My situation is very similar to odi id number : 10136903. I have a 2003 Jetta. I was driving about 65 mph, my abs warning light turned on, air bag warning light turned on, and my radio turned off. After stopping my car, it wouldn't start again. I had it towed to mechanic, who determined that my fuse panel (above the battery) had melted and he was very surprised that my car hadn't caught on fire. He replaced the fuse panel. A few days later, my car failed to start again. A jump start started it. Next day, my car failed to start again. A jump start started it. I drove it straight to mechanic. My alternator, which was fine last week, is now fried (after two drives), most likely because the fuse panel burnt it out. The alternator in my 2003 Jetta is a 90 amp alternator. Vw stopped making these because they aren't powerful enough for the cars. I repeat, 90 amp alternators are no longer made for my car because it requires 120 amp alternator. Hmm.