Alternator AC DELCO or OEM BMW

I'm showing a new acdelco 135amp alternator for roughly $163 plus shipping through rockauto.

Acdelco is oem for GM. They make high-quality parts, never been disappointed by one.

ACDelco makes a brand new alternator for $95. They were the OEM for GM.

I went with RockAuto as well, but went with the AC Delco Gold Reman that was wound to have 135 Amp output instead of the OEM standard (~110 I think) I want to say it was around ~$170 with a $45 core deposit. AC Delco is a solid name in parts, and I believe was reman'd in Mexico.

My alternator went and I never had any lights, just weird electrical gremlins and batteries dying. Replaced it myself, took maybe 2 hours and the part was like $150 after the core return

On that list, I'd only go with the AC Delco.

Only brand here I am confident with is ACDELCO, Wai I’ve installed due to customer already having the part but I cannot swear to its reliability.

AC Delco makes a good product. Alternator technology is really old, so it's not difficult to do right.

Honestly, even the AC Delco quality is questionable.

ACDELCO because if I get another API alternator that’s defective I’m going to kill somebody

I ended up getting a new one from BMW after two remans failed with once catastrophically failing and catching fire almost burning up my car.