Audi Porsche Mercedes VW Voltage Regulator - Bosch 1986AE0124

My '99 996 was having some electrical troubles, battery would slowly drain over a few days and I'd resorted to keeping it on a battery tender. Well the car eventually wouldn't start after being driven a few miles and the voltage on the dash was low bout 11.8 when running at any RPM..... So I pulled the alternator and took it down to the local parts store to bench test it. It passed the test. I tested the main electrical cables for resistance (Ohms) and they were all fine. Did some reading on the forms and this voltage regulator seemed to be a typical culprit. The forums also mention a broken voltage regulator can pass alternator tests. For $30ish dollars it seemed a cheap enough fix for my sanity. Took the old regulator off my alternator (85K miles) threw the new one on and took the car for a spin. Alternator voltage shot up to 14.2. I'm calling that problem solved. I'll keep an eye on it to post updates but this seems to be a fix. Fast shipping too, arrived two days earlier than estimate.

Just What i needed instead of replacing the whole alternator that still worked great

Needed a new voltage regulator, did some homework, found this one would fit the alternator installed in my '02 Jetta (trust but verify--YMMV). Did the trick and continues to function a year+ later.