Any input here is greatly appreciated. Lately, usually after being driven at least for 1 four, my 323i has difficulty starting (engine turns with check engine light on - problem is intermittent and not always) but after a few tries, it will eventually start (check engine light off - engine so smooth as though nothing happened). My mechanic said the diagnosis is a failing cam sensor. Problem became worse as it died on the freeway yesterday! I restarted it without any difficulty. Question is can a failing cam sensor kill the engine? Took it in for a 2nd opinion and was told by this mechanic that cam sensors don't do that. Since the car is running so smoothly after restarting with the check engine light off, there is no way this could be diagnosed until it actually happens. He thinks it is a sticky fuel pump but not sure. For safety, I just don't feel confident driving the car on the freeways now. Anyone who has experienced intermittent problem such as this, please let me know or any other suggestions are welcome.