2004 Audi A4 1.8T

2004 AUDI A4
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VINCE
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I recently bought the car and it started to make make a humming like noise when I turn off the car.
Then short after- while the car is off- I turn the key to the electrical mode and it makes the pretty loud humming noise (almost sound like its comming from my exhaust starting in the middle of the car towards the back). I can turn the key off and to the electrical mode twice (2) before the humming then stops. I then have to turn the car on and off again to repeat the process and hear the humming again. WHAT CAN THIS BE?
Apr 23, 2007 at 10:34 AM
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AUDIOWNER_2003
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I am not sure of the answer to your question, but you are not alone. I have a 2003 Audi A4 1.8T with 60,000 miles. I have a similar humming or vibration noise coming from the car. The noise seems to be coming from the under right side of the car, and I am suspicious of the exhaust system also. I just had my car in the shop, and the garage could find the source of the vibration. The humming sound still continues, and seems to be worse when the car is idle or at low speeds (city driving) rather than highway driving. Did you find the answer to your issue?
Jul 2, 2007 at 11:58 PM
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VINCE
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I took it to the dealer to try and figure out where the noise was coming from. The vibration sound you're taliking about (which you clearly hear during normal street driving) seem to be a brake problem. The dealer told me (after 4+ hours of test driving my car) that my right caliper was loose and that my after market brakes could have influenced the problem. The dealer tighten my brakes and since then the humming has stopped. It could also be noise comming from your brake shield; if your car is lowered it too can play some part in some unusual noises.

I was wrong about the exhaust system- I took mine to a muffler shop and they checked for holes and nothing was found; they did needed to tighten my pipes in th center of the car.


The other noise(s) I'm trying to figure out today is:

Why is it when I hold up the window buttons it sometimes makes a humming noise? This noise happens every so often.

Why is it when I change gears (car is stoped going into reverse or into gear) that when I press my brakes I hear a metal ding noise?
Jul 3, 2007 at 11:55 AM
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