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Old 12-12-2012, 11:20 AM   #3
Registered User
Join Date: Feb 2011
Location: New york
Posts: 5,814
My Ride: Fst'r then your e46
are you asking whats the sound coming from the engine for the first 30 seconds of startup when the car is cold?

If yes, its your secondary air pump doing its work.

I used to be an e46 owner. I love this one more.

zhenkaaaM3 is offline   Reply With Quote