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      08-13-2019, 12:08 PM   #1
UberXY
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Heavy vibration

So our 08 X3 has a vibration under acceleration that is getting progressively worse. It starts around 20 mph and by 70 itís pretty much undriveable. Sometimes though when coasting it gets temporarily better.

Iíve changed the engine mounts, center carrier bearing, and guibo. I donít think itís a bad tire/wheel because sometimes it improves with foot off the gas. Both front axles have good rubber covers on both ends; I canít feel any play in them; and there is not any clicking on cornering. Iíve heard speculation about coils and plugs but they are all about a year old and the engine seems to run fine with no codes showing.

Iím stumped. Any experience-based thoughts?
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      08-14-2019, 08:53 PM   #2
cosmoxi
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I had the exact same problem in 2007 X3 with 100k miles. It was the rear drive shaft.
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      08-27-2019, 09:04 AM   #3
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      08-29-2019, 06:07 PM   #4
UberXY
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It was a bad u joint in the rear half of the driveshaft. I spent the afternoon replacing the driveshaft; car runs great again.

PS apparently the u joints are not replaceable, so you have to replace the whole driveshaft, which isnít a bad job. I bought one on Amazon for about $425
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Last edited by UberXY; 08-31-2019 at 08:01 AM..
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