31 90 ... Troubleshooting Shock Absorber
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 335xi, 2008 BMW 328xi, 2007 BMW 335xi, 2007 BMW 328xi, and 2006 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Read and comply with Information on replacing shock absorbers. See 31 00 ... Information on Replacing Shock Absorbers .
TROUBLESHOOTING SHOCK ABSORBER
| Fault | Cause | Remedy |
|---|---|---|
| Wheel knocking (bottoming) | Auxiliary spring faulty | Visually inspect auxiliary spring for cracking, replace auxiliary spring. See 31 31 041 Replacing Front Left or Right Spring Strut (AWD) AWD only: Visually inspect support ring for damage |
| Shock absorber leaking (oil/gas) | Replace shock absorber. See 31 31 041 Replacing Front Left or Right Spring Strut (AWD) | |
| Rattling noise | Shock absorber mounting loose | Tighten shock absorber |
| Support bearing faulty/hardened | Replace support bearing | |
| Shock absorber leaking (gas/oil) | Replace shock absorber. See 31 31 041 Replacing Front Left or Right Spring Strut (AWD) | |
| Worn down areas (flattened areas) on tire profile | Shock absorber leaking (gas/oil) | Replace shock absorber. See 31 31 041 Replacing Front Left or Right Spring Strut (AWD) |
| Long after-swinging of body after driving over rough road | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber. See 31 31 041 Replacing Front Left or Right Spring Strut (AWD) |
| Building-up of body in case of successive uneven surfaces | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber. See 31 31 041 Replacing Front Left or Right Spring Strut (AWD) |
| Wheels jumping even on normal road surfaces | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber. See 31 31 041 Replacing Front Left or Right Spring Strut (AWD) |
| Whistling noises | Separating skin in vent holes of auxiliary spring | Remove separating skin |