2000 Audi S4 Question Noise on Audi S4

BH617

MEMBER
2000 AUDI S4
6 CYL
AWD
MANUAL
95,000 MILES

When driving on the highway, I can hear a high-pitched rattle that almost sounds like a squeaking/squealing noise. I am not sure where it is coming from, but I think from outside the car (not in the dash). This usually only happens at higher speeds (above 50mph) and only when coasting, not if accelerating. Any idea what this may be or how to investigate this further? Thanks.

1 Reply

VLADGEISER

MEMBER
66 POSTS

I can't remember if this car has a three piece rear drive shaft, if it does there is a center support bearing that could be causing the squeaking, though it will usually do it all the time once it goes bad.

Else wise check your wheel bearings, and dust shields for the brakes as those tend to get bent and rattle occasionally or rub against your rotors and cause a highly annoying and pitched squeaking or squealing sound. Also check for brake drag as a bad caliper will drag you pad and cause a very similar sound.