Question about 2004 BMW 3 Series

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While in neutral and the car is rolling with about 20 -30 km i hear a pounding sound coming from the rear axle something like knock knock sound like something is blocking and unblocking , the some sound can heard when i go into tight corner without any gear in the gear box and also in slow speeds . additionally the sound can be heard when i go in reverse stop and put first gear the some sound is heard thank you .

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  • BMW Master
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The car needs to go on a lift to have the back axle and suspension checked out. The BMW 3 series is rear wheel drive and it is possible that the sound you are hearing is a bad universal joint in the driveshaft or there is a problem with the rear diff.

Another thing to be aware of with the 3 series is that owners have reported problems with the rear subframe cracking and making noise like you describe.

However, given your experience with the noise happening at different times in relation to how drive is applied, the most likely cause is a problem in the drive train as I mentioned earlier.

Have the car examined as soon as possible on a lift as the longer you leave this the higher the risk of damage to other components.

Posted on Nov 11, 2010

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Posted on Jan 02, 2017

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