A worn-out center support bearing can lead to some annoying side-effects. The driveshaft on BMWs is broken up into 2 sections. The center support bearing is where the 2 sections meet. It consists of a metal bearing in the middle that is surrounded by vibration-absorbing rubber. As the vehicle ages the rubber becomes weak and rips away from the bearing. The result is a vibration and a bad thumping or knocking sound.
Center support bearings help to add some support to the driveshaft in a BMW. Because it is designed to be a two piece system, bracing needs to be added to the center to keep your driveshaft in line and tight. If you are noticing excessive vibration or gear noise in your vehicle, it may be time to replace the support bearing.
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