E46Fanatics - View Single Post - Noise under the bonnet (Hood)
View Single Post
Old 12-12-2012, 11:20 AM   #3
Registered User
Join Date: Feb 2011
Location: New york
Posts: 5,870
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.
Former E36 M3 Owner + E46s
zhenkaaaM3 is offline   Reply With Quote