2008 BMW 335i HUGE electrical issues

[corbinado]

Hey everyone,

So I was cruising along a few weeks ago when every light from abs to transmission popped up and the car started to drive horribly. Took it to the stealership and they diagnosed it as a bad alternator. I replaced the alternator (not there) with an OEM Bosh and it had the same issue. Then I replaced it again and it had the same issue. There's something draining off power and it's causing the entire car to freak out. The battery has been tested twice and it's fine. We're currently charging it to full to see if that helps.

Any thoughts on the issue?

Thanks

[RocketSurgeon]

Load test the battery to be sure. Definitely a power issue, check your battery connections, ground straps, etc. You might also check that the battery was properly registered.

[corbinado]

Hey Rocket,

We're leaning towards the battery or something drawing power on the car somewhere unnaturally. It's weird because the car will die, but it will start back up without jumping the battery after a day or two.