Alternator OEM BMW or OEM Nissan

I've replaced the alternator (failed on me), done waterpump & thermostat (180,000km done as a precaution).

Had one do this on me and it was the alternator.

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

Z1 Offroad has an OEM Nissan remanufactured for a good price, that's I what I went with.

you dont even need ISTA to figure out the alternator is dead. A fresh and charged batter will sit at 13v, used should always be around 12v. while charging it should be 13v. the fact this is dropping while the car is running suggests a shot alternator right off the bat

Sometimes when u replace the alternator but the battery is bad it'll just fry your new alternator.

The voltage regulator on the alternator is bad.

I bought a remanufactured alternator from Autozone and it did not work. I then bought an amazon alternator. It went out 2 weeks later. I then bought the OEM Nissan alternator. I've not had a problem since (6 months)

November of 2023 I had to replace the alternator. I purchased an aftermarket and had a mechanic friend install it for me. 6 weeks later it started acting up again and left me stranded. The battery tested good, alternator was bad. I returned the alternator and was warranted a second one. Roughly 2 months later, the battery light comes on while I am out of town. I pulled into a local parts store and had it tested. Battery tested fine. Alternator tested bad. The Nissan dealership says it is the alternator. But since I had not used a factory alternator that was the problem. Apparently the aftermarket alternators can not handle the load and are not set up properly.

We were on our way back from a daytrip when the M3's alternator decided to give up the ghost about 1.5 hours from home.