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Knocking noise under heavy acceleration


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Started today. Put my foot down and heard a knocking noise and felt it through the floor of the car. Seems to be getting worse and now have a loud knocking noise transmitted through the centre armrest (can really feel this through my arm) over every bump.

Putting the car in neutral whilst it's moving still presents the knocking when going over road bumps. Could this be suspension related?????? This car has only done 55,000 miles!!!!!

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Check the wheels bolts are tight.

That's the first thing I did. I honestly thought a wheel was loose.... They were all tight though. This really is consistent with the drive shaft bearing failing. Looks like I'll have to wait till Monday to get this confirmed though.

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Well, confirmed. The prop shaft bearing had failed. Started to drive the car to a garage first thing, but decided to call breakdown recovery to get it transported there - didn't want to cause any more damage!

They managed to fit a universal bearing, breaking the prop shaft and reassembling it. All fixed. Another £280 spent!!

Are there any other common problems I should expect on a 2004 Cayenne 3.2 v6?? Car has done 55,000 miles.

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