Faulty Camshaft Position Sensors

[y5choi]

I brought my 07 4.8i in today to the dealers after having the check engine light on for 2 weeks.

The fault code is -faulty camshaft position sensor and 4 of them have to be swapped out. My service rep says there's a service bulletin out from BMW that this is an existing problem.

Symptoms: The engine will crank but fail to start- not often but once in a while (1/ in 6-8 months?)

I've been thinking that there is something wrong with the fuel, but I guess that's not the cause.

Rep says the engine should run more efficiently now- we'll see how that goes.