I only trust OEM, Denso, Valero, and Hitachi. Bosch isn't too bad.
The Duralast one looks to have a lifetime warranty.
I have one. I replaced a Bosch with it. Hasn't had an issue and had a lifetime warranty.
Yes. I had one on my e39 (M54) for a long time. Probably put close to 75k miles on it before I sold it. It was the Bosch variant. No issues with it at all. In fact, it appeared to be a Bosch reman in an Autozone box. Hard to tell what the internals were but they looked exactly the same.
If anyone is curious, the 120a Bosch and Valeo alternators (rectangle ground connection) are completely interchangeable despite the statements online saying they have different pullies and mounting points. They are slightly different but everything lines/bolts up the same. The Bosch (left) is a decent amount larger in size, not sure why, but it fits perfectly with no clearance issues.
Been running a duralast in mine for about a year no problems.
I order a Bosch AL113MX Reman Alternator (yep Bosch reman the Motorola) since that was what was currently in there. The 81 has a big square York compressor mounted right on top of the alternator which means that to get the rear alternator bolt you better have the right extensions and you are going to do it blind. So after at lot of effort I got the old alternator out and the new one in and only then did I notice that the pulley did not line up.
13V is normal for a stock Bosch alternator. There are 14V or adjustable voltage regulator available as a replacement.
Duralast 11120 (if that's what is on the invoice) doesn't have a lot of great reviews...
Alternator and the battery are overpriced 2x (google replacement Varta battery and smth like Bosch alternator for your car on pkwteile or idealo).
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