Alternator Bosch or Denso

What sort of alternator are you installing, because I've had two Chinese alternators fail but a genuine denso from pull a part has survived a good thrashing

I only trust OEM, Denso, Valero, and Hitachi. Bosch isn't too bad.

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.

On my 2010 Corolla I replaced it with a Duralast one and it lasted a couple months, then I replaced it with a Denso one and haven't thought about it since. Cars got almost 250k miles on it.

I supply Denso alternators for d3,4 Rrs

Denso is the OEM. I chose to rebuild mine with new bearings and brushes from Honda. The rectifier was the actual bad part, though. I put an aftermarket rectifier in for $30.

B5/5.5 alternators come from two vendors, Bosch and Valeo. I've heard they're not interchangeable because of different pulleys.

Good thing you got a Bosch instead of the duralast. I had a duralast alternator last about 2 weeks and when I was standing in line at AutoZone to return it and buy a real alternator, there was someone behind me also holding an alternator that lasted two weeks.