E93 Cranks But Won't Start - Tech Tip:

Had a 2008 328i (28,000 miles) come in with a crank but no start condition. The dealer had checked everything and came up empty handed. I discovered the problem was a loose ground behind the upper half of the rear passenger's seat. I applied dielectric grease and tightened the 6mm nut (10mm hex) and the car fired right up.

Hope this helps...

P.S. My bad, E90

Originally Posted by Doktor Bert

Had a 2008 328i (28,000 miles) come in with a crank but no start condition. The dealer had checked everything and came up empty handed. I discovered the problem was a loose ground behind the upper half of the rear passenger's seat. I applied dielectric grease and tightened the 6mm nut (10mm hex) and the car fired right up.

Hope this helps...

P.S. My bad, E90

What was the ground for? Was it a muti-point ground? How did you find it? Let's face it, the back of the car is not where we usually start looking.

Originally Posted by DSXMachina

What was the ground for? Was it a muti-point ground? How did you find it? Let's face it, the back of the car is not where we usually start looking.

Yes, blade-type multi-point ground. Just started looking at the wiring diagram and found the grounds for the DME were located there.

Originally Posted by Doktor Bert

Yes, blade-type multi-point ground. Just started looking at the wiring diagram and found the grounds for the DME were located there.

Good catch!

Would you mind taking a look at Autoque's thread in regard to vanos and valvetronic? It's not really about those things. Your input would be helpful.

Sure, I'm not really a BMW expert, I'm actually a Mercedes-Benz guy, but I am happy to help. Can you send me a link????

Originally Posted by Doktor Bert

Had a 2008 328i (28,000 miles) come in with a crank but no start condition. The dealer had checked everything and came up empty handed. I discovered the problem was a loose ground behind the upper half of the rear passenger's seat. I applied dielectric grease and tightened the 6mm nut (10mm hex) and the car fired right up.

Hope this helps...

P.S. My bad, E90

THAT'S good info - thanks!