Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2013128I 2D CONVERTIBLE, ENG CD N52, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1009 (FRONT AXLE - REPAIR)TROUBLESHOOTING31 90... TROUBLESHOOTING SHOCK ABSORBER
2013 BMW 128i 2D Convertible, Eng CD N52, Standard Trans
31 90... Troubleshooting Shock Absorber
2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION 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 |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.