Noise under the bonnet (Hood)
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12-12-2012, 12:20 PM
Join Date: Feb 2011
Location: New york
My Ride: Fst'r then your e46
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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
Custom Rear Diffusers For E36 M3
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