[nazali]

Originally Posted by Kernel Kurtz

I've used the pressure washer at the car wash on all my BMW engine bays with no ill effect. Just don't hold it too close.

Unless you have fluid leaks really it is only dust that needs to be rinsed off now and then. I've never even used any kind of cleaner. Just a quick spray every few months is all it needs.

^^^ best advise ever !