I would try replacing it with a stock Bosch alternator.
Between the two that I've owned, I have way over 250k miles in 'em and they are awesome vehicles. Maintenance has been very reasonable although we just had to put a new alternator in the one we have now.
Got it. So am I correct in thinking that these Bosch alternators have both diodes to get to DC and voltage regulators to make it a clean voltage?
Welp... the alternator AND the battery are dead. New battery is in, now to do the alternator but I need food first. I was amazed that the store had a rebuilt Bosch alternator IN STOCK
My 05' Golf TDI came with a Bosch unit from the factory and lasted about 90k or so, I replaced it with a Bosch Reman and its been doing well, 120k now.
I got an OEM (Bosch) new replacement 120A alternator from German Auto Parts. It came with the pulley installed.
I ended up with a Bosch reman from AutoHausAZ .. was a bit cheaper than europarts-sd.
I would definitely replace your alternator if it is dead. I had the same problem on another one of my cars (Ford). It was really frustrating because the alternator tested good but it kept happening so I thought it was the battery and got a new one. It stopped for about a week but then started again. The alt. was the problem after all. I would also go oem Bosch because the autozone ones don't last that long.
I recently replaced my alternator with a new Bosch. It has been running fine now for about 300 miles. Now however my alternator light is coming on.
I had a Bosch reman that self-machined itself to pieces in less than a year on my street car - the car that rarely saw more than 5K rpms. The Bosch replacement seemed to work OK but I sold the car shortly thereafter.
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