Replaced battery, but still getting ABS, Brake, & Traction lights flashing

[GrayZ4MCoupe]

Hey all -

I read through a bunch of the posts here and found that many people had issues with the ABS, Brake, & Traction control lights flashing while driving. I found many that said that replacing the battery fixed their issue.

I replaced my battery today (old one was 3 years old) and then took it for a spirited drive. Everything seemed great and then 15 mins into the drive saw the lights flashing again. This time, they also had the battery light illuminate.

I brought it into my garage and while the battery light was illuminated, I hooked up my Autel code scanner and noticed that the ECU was reporting approx. 12 - 12.2v while the car was on. I replaced my alternator voltage regulator a few weeks ago when I saw something similar and then after that the voltage was showing 14 - 14.5V when turned on.

Could it be anything else or am I looking at a complete alternator replacement? If so, can you point me to the suggested one (non-OEM)?

Thanks in advance!

[Piper1]

Any fault codes that they list here? https://modulemaster.com/products/bm...0e-abs-rebuild

[XMetal]

If you're still seeing under 13v with the engine running after replacing the voltage regulator and battery, then it's the alternator itself. Valeo, I believe is the only one you can buy brand new. All others, including OE BMW alternator, are remanufactured.

[GrayZ4MCoupe]

Originally Posted by Piper1

Any fault codes that they list here? https://modulemaster.com/products/bm...0e-abs-rebuild

No, none of those codes exist.

Originally Posted by XMetal

If you're still seeing under 13v with the engine running after replacing the voltage regulator and battery, then it's the alternator itself. Valeo, I believe is the only one you can buy brand new. All others, including OE BMW alternator, are remanufactured.

Thanks. I ordered one from RockAuto that's made by Valeo for $286 along with a new accessory belt.

[GrayZ4MCoupe]

I just wanted to update this thread. I replaced my Alternator with the Valeo unit at RockAuto and the lights went away.

Thanks all!