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Discussion Starter #1
Hi All,
While driving in mainly low rpm's, I've been hearing an intermittent groaning/moaning which sounds like it's coming from under the car. You can clearly hear it inside the cabin but not sure what it could be? Driveshaft maybe? Any thoughts would be appreciated. 2002 540i


Carls 540i
 

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189 Posts
Discussion Starter #3
Changed pump a few years ago, no leaks. I was riding in the back yesterday and it's very noticeable from the back seat.
 

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Under the lift arms
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12,946 Posts
wheel bearing...

does it go away when your at speed (70) and you turn right and left.... (*chassis roll)
 

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Older than old school
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4,461 Posts
How does the sound change as you depress the throttle? If it disappears when when you step on the gas, it could be a vacuum leak, causing the diaphragm in the CCV at the back of the intake manifold to vibrate.
 
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