I bought a Optimal aftermarket crankshaft sensor for my BMW. It was decent price. So full of expectations I replaced oem part. It’s simple procedure.

https://www.optimal-germany.com/en

Then suprise! Car won’t start!

After some research I found out that pins are not the same. Optimal should be quality replacement parts from germany. Now I don’t know am I just unlucky or their parts are crap! Now I’m waiting for auto parts store for replacement!

Optimal on left and oem part on right