humming noise
 

hi everyone..need help..i have been hearing a faint electrical humming noise inside the car..if i idle car in park and just tap the gas i hear the noise become a higher pitch and when i let off the gas it goes down...it sounds like it is coming from the dash..but you also hear the humming sound when you stand outside of the car near the rear left wheel...the best way i can describe it is the sound of a electric fuel pump...it is very annoying..can anyone advise..thanks rob

Idle tensioner pulley...Its high pitched right? annoying too... Its probably less noticeable when the car is fully warmed up, but still there right?

are you a doctor in Arkansas? (too soon?)

Is your radio on? oh wait outside too? if a cold start it could be secondary air system, mine hums like a son of a gun. i'm removing it soon.

noise
 

yes it is there..only difference is that you hear it by the left rear tire

Try to isolate where the sound is coming from, is it coming from outside? like inside the engine bay somewhere? or is the noise coming from the inside of your car when you are inside the cabin?

humming noise
 

i can only track it down to 2 places..on is inside car from dash the other is read of car loudest from left rear..i opened hood and did not hear it..thanks rob

Its something else then...I'm not sure but from what you're sayin it doesn't sound like its coming from the engine bay..

could it be something faulty with the air suspension? i know you said dash, but sounds can be deceiving. is the x sitting right? do you have air suspension in the back?

Just a guess: FSR/Hedgehog.

It can cause all sort of problems and noises.

humming noise
 

hi everyone just got back from the dealer...made the tech hear the noise as i described in my previous thread and he thinks it is the fuel pump...so i left it at the dealer for further investigation...if it is he said they have to remove rear seat for the fix...2005 x5 with 17k...is it a big job qm....is it a bit premature for fuel pump to go...will let you know when i get response from dealer for confirmation of problem..thanks rob