Just bought a new 2007 and noticed that after I shut the engine off after I get from work. I can hear kind of a low pitched electrical humming sound for about a minute coming from the rear of the car underneath (possibly the fuel pump? but what is it doing?) Then, after that noise stops I hear a higher pitched noise possibly from the engine compartment for another minute.

Anyone experienced this? I have never had a car do this and am curious what it is. Thanks!!!

 

I'd say ask the dealer. Front might be the fan but rear..?? I got '06 3 S and don't hear anything

 

did you have the AC on? im not sure what the noise is exactly, but it is a normal thing for the AC to do after it shuts down.

 

and in the owners manual, it says something about that noise in the back. its normal to.

 

Have a "07" 3 I as well. It does the same thing and I only have 455 miles on it!!! Assume it must be normal!!

 

By the way, does anyone know how the side sill extensions, fog lights, and the wing spoiler are attatched? I want to purchase these for my 2007 3I touring, but I am affraid of having holes drilled all over the body. If anyone has had these installed, please let me know how it's done or if it can be done myself!!!!!!Thanx!!!!

 

Holes will be drilled