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      10-10-2012, 06:00 PM   #15
marshall834's Avatar

Drives: The spirit of a 2007 BMW 335i
Join Date: May 2012
Location: The Biggest Little City in the World

iTrader: (8)

Originally Posted by Goofyguy View Post
There are a few noises that start with a BMW, first you have the DTML pump which does a quick pressure test on the fuel tank to see if there are any leaks. Then you fire up the car and if its a 330 or 335 you will hear the exhaust valve closing (metal rattly sound). Then if its a coupe the seat belt hand ups, a few tones, then the radio. Its a poorly designed orchastra of annoying. Mine has a rattle at high speeds on the highway coming from the back seat area.
I think I hear that pump every time you open a door, unlock your doors, correct? Small humming sound.

I'm not so sure I've ever heard the exhaust flap closing. I'll have to pay attention to that.

Regardless, good info, thanks!
E90 TiAG 335i |6 MT | JB4 | BMS DCI | LUX 5.0

E46 323ci
B6 Audi S4