What brand alternator did you use? If not OE, Bosch, or Valeo, change it again.
Replaced the 2017 ACDelco alt with a Duralast Gold 160 Amp. Life time warranty. For 200 bucks at Auto zone. Hope this is the last one I buy.
Step up and buy a Bosch. Yes, they do fail, but the odds are much less.
Bosch is still the gold standard but not what it used to be. Don't buy cheap junk.
Stick with a high quality oem replacement alternator; VW installed a number alternator oem brands (bosch, Valeo, Hitachi, etc). My 2002 New Beetle Turbo S; had a Valeo 120 Amp unit installed, I had a hard time finding a Valeo unit, so I went with Bosch and so far, I have not any issues with it but the body of the alternator, was slightly bigger, so the wiring harness, was a bit of a tight fit.
You can get a Bosch alternator for a KA and swap the pulleys
I want to replace the alternator myself, but I can't find where to get OEM parts for a reasonable price. The dealership is charging $340 for the part and the best I can find is this [Bosch alternator](https://www.amazon.com/dp/B001C64QHE/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=TXMF4LHVIWCE&coliid=IN63F3OG0M77W) on Amazon which they state is new, but it seems like all Bosch alternators are remanufactured. Why is it so damn complicated to find high-quality replacement alternators?!
B5/5.5 alternators come from two vendors, Bosch and Valeo. I've heard they're not interchangeable because of different pulleys.
I had a bosch alternator in my Mark 2.. 8valve motor. I noticed the battery was not being charged. so instead of dealing with the voltage regulator or brushes etc, b/c the unit was old I decided to go with a brand new one.
I when my original alternator failed in my 540i/6, the replacement rebuilt Bosch unit would produce 13.5-13.7v for a while after the car had warmed up, then would gradually fall to less than battery voltage. Running the A/C and revving the engine at stoplights would keep the battery light from flickering, but eventually, it would show full symptoms of a dead charging system.
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