[aaaTu]

Help needed!!! THANKS!
I have a 2007 E90 335i sedan and it won't start one night right after I came out of grocery store.all dashboard and lights seem working fine. called AAA and jump start the car, the car won't start either.

After the car towed back home I disconnected negative cable for a few minute to clear IBS sensor and jump start with my own external battery with "normal" positive and negative terminals, the car still won't start, but it starts when I connected the external battery negative to engine oil cooler.

and later on the red battery charging light came on, Is the alternator dead or my car has a ground issue?

I have drawn (sorry but bad drawing) on a engine bay picture I downloaded from internet.

[aaaTu]

Replaced the ground cable, everything back to normal.

[GoRomeo]

Originally Posted by aaaTu

Replaced the ground cable, everything back to normal.

cool man thanks for sharing this. My car would not start yesterday, not even using Tow truck as jump start. I tried jump started using the chassis and ground terminal but did NOT try using the engine oil cooler.

What ground cable are you referring to?