Okay, I've done this on two cars now (throttle body cleaning.) I used 3M throttle body cleaner. It worked great. CAUTION!!! ON the second car (my friend's, naturally) the rubber boot between the air mass sensor and the throttle body was extremely brittle and broke upon removing the air mass sensor. I suggest that anyone contemplating this obtain a replacement boot to have on hand before starting the job.

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Bob Johnston
03 E55
Comand/Nav/Bluetooth/Ipod added
Black/black
(Oh man, this car is sooooo fast.)