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.
The stock center support bearing carrier utilizes an extremely thin layer of rubber to secure the driveshaft, allowing for minimal movement to effectively insulate the cabin from noise, vibration, and harshness (NVH). However, this design is less effective at maintaining proper bearing alignment under heavy loads. Over time, it allows the bearing to gradually sag, disrupting the driveshaft alignment and introducing play in the driveline during gear shifts and throttle application. The original equipment manufacturer (OEM) rubber bushing has a tendency to sag, become brittle, and eventually deteriorate, resulting in dry rot and cracking. Even in well-maintained vehicles, the stock bushing can develop cracks in as little as 5-10 years. When the bushing loses its integrity, it can lead to pronounced vibrations, clunking noises, and increased stress on the bearing. Adding to the challenge, the stock carrier is permanently molded onto the center support bearing, making replacement a difficult task that typically necessitates specialized tools.
Show More Show Less
