Well thats wierd .

[Pr1vateer]

Hey Guys....I hadn't driven my Z3M for about a week , this morning I started the car and drove It a few hundred yards still In first gear then all of a sudden this loud buzzing noise came on In the cabin I thought wtf I turned the engine of then back on and the buzzing noise went away , weird .
Does anybody know what that buzzing might be and what might have caused It ??

Thanks for any Input .

[mchart]

A fan buzzing noise on startup (Sounds like a typical failing electronics fan) in these cars is typically one of two things on a Z3M. Either the DME box fan, or the secondary air pump for emissions.

You'll need to track the problem down more to indicate if it happens actually just in gear or not. If in gear only, it likely has nothing to do with what I mentioned.