I'd just get something with a warranty. I've been using Duralast from Autozone for the longest time and haven't had too many issues
Pros: warranty, not many issues
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I bought a Duralast for my ‘99 E55 a few years ago. It didn’t work so I pulled the rectifier off of it, put it on the original one, which put out at 14.2 v back in the car. I returned the Duralast one after I made the old rectifier look like new. The shaft rotation on the Duralast felt gritty, too.
Cons: didn’t work, shaft rotation gritty
Duralast = Duramightlast. They're just overpriced cheap rebuilt cores.
Cons: overpriced, cheap rebuilt cores
All I could recommend is stop buying the autozone/duralast alternators. Buy a good brand, ie Denso, Delco, Motorcraft, etc. and return the duralast one outright for cash in hand.
Pros: return for cash
Cons: prone to premature failure
Duralast..... if you want to get really good at changing them.
Cons: changing them
Autozone will give lifetime warranty on certain (duralast gold maybe?) alternators. I got the replacement very wet (dumb), and it died while I was driving.
Pros: lifetime warranty
Cons: died while driving
I want to hear an opinion on getting a duralast alternator and popping it in my n52 I have heard very mixed things about these parts some work fine others are trash.
Cons: mixed reviews, some trash
I went through 5 of those Durlast gold alternators (supposedly the best version of autozone's stuff) in 2 years before I had enough and bought a the Denso.
Pros: unlimited warranty
Cons: frequent replacements needed
Just bought and installed a Duralast Gold from Autozone last week for my '07 9-5. It has a little whine at 2500 RPM but works better than OEM. Has a lifetime warranty and it's 100% new too!
Pros: works better than OEM, lifetime warranty
Cons: whine at 2500 RPM
Vehicle:
Saab
When my alternator failed in my 24v, I replaced the alternator with a duralast, replaced the harness and fuse panel with OEM parts, and 50k later it's still working like a champ.
Pros: working like a champ
Mileage: 50000 km
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