Best has been new Bosch or Delco-Romy from jobber stores. Never had one of those fail yet.
I think I put a Bosch 145 on my 01 5.3 and it’s been a non issue
After that I would pick the Bosch reman. A junk new alternator is going to last a fraction of the time of these 2.
The Bosch reman is the one I'd go for. I've got it in mine.
I had to buy a replacement remanufactured alternator (Valeo 120A one) and it was a straight replacement that solved the problem.
Fcp euro, Bosch alternator for less than $400 including core charge, free shipping. Lifetime replacement. Believe it’s 5% off 250+ currently as well. Bosch is the OE supplier, no aftermarket concerns.
Looks very similar to a Porsche 944 alternator.
I own the exact car, when I bought it, it came with a bad replacement alternator. The replacement was an eBay brand which was causing all sorts of faults. I replaced it with a Bosch unit and the car seemed fine. A few weeks after the replacement, I started getting a random limp mode with various under and over voltage errors. At this point I decided to buy and install a BMW branded alternator. This took care of issue.
Ive had a few Bosch reman failures lately at my shop as well, although they were for N52s, all bearing noise after about a year.
Symptoms: Flickering lights, and occasional hiccup start. Now battery light is coming on and staying on. When stationary battery tests around 12.5 volts. When running, that drops to 11.7 volts.
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