31 90... Troubleshooting Shock Absorber
WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
Read and comply with 31 00... INFORMATION ON REPLACING SHOCK ABSORBERS .
SHOCK ABSORBER TROUBLESHOOTING CHART
| Fault | Cause | Remedy |
|---|---|---|
| Wheel knocking (bottoming) | Auxiliary spring faulty | Visually inspect auxiliary spring for cracking, replace auxiliary spring
. See 31 31 031 REPLACING FRONT LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . AWD only: Visually inspect support ring for damage |
| Shock absorber leaking (oil/gas) | Replace shock absorber. | |
| Rattling noise | Shock absorber mounting loose | Tighten shock absorber |
| Support bearing faulty/hardened | Replace support bearing . See 31 33 001 (REMOVING AND INSTALLING) REPLACING FRONT LEFT OR RIGHT SPRING STRUT SUPPORT BEARING . | |
| Shock absorber leaking (gas/oil) | Replace shock absorber | |
| Worn down areas (flattened areas) on tire profile | Shock absorber leaking (gas/oil) | Replace shock absorber |
| Long after-swinging of body after driving over rough road | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber |
| Building-up of body in case of successive uneven surfaces | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber |
| Wheels jumping even on normal road surfaces | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber |
| Whistling noises | Separating skin in vent holes of auxiliary spring | Remove separating skin |