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 1879 (RESTRAINTS - REPAIR)SEAT BELTS72 11... CHECK LIST FOR AUTOMATIC SEAT BELT
2013 BMW 128i 2D Convertible, Eng CD N52, Standard Trans
72 11... Check list for automatic seat belt
2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION 72 11... Check list for automatic seat belt
WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2015 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.
| Was the automatic seat belt with lower strap replaced after an accident, e.g. frontal and/or oblique collision in which the impact absorbers/deformation elements were permanently deformed? (only while seat belt was fastened) |
No | Replace complete automatic seat belt The following must also be checked and replaced, if necessary: seatbelt mounts on the vehicle body seatbelt mounts on the seat seat rails. |
| Yes | ||
| Does seat belt lock when pulled out suddenly? | No | Replace automatic seat belt (upper seat belt). |
| Does the automatic reel eliminate the belt slack? | No | Replace automatic seat belt (upper seat belt). |
| Yes | ||
| Yes | ||
| Can the seat belt strap be pulled out without jamming? | No | Automatic reel is loose - tighten reel. If fault persists: Return spring broken - replace automatic seat belt (upper seat belt). |
| Yes | ||
| Does the strap on the front seat belts retract automatically? Does the strap on the rear seat belts retract automatically, a small remaining loop is acceptable if this remaining loop is fully retracted when the seat belt strap is readjusted. |
No | Automatic reel is loose - tighten reel. Excessive friction in belt guides - replace automatic seat belt (upper strap). Return spring broken - replace automatic seat belt (upper seat belt). |
| Yes | ||
| Does automatic reel make a squeaking noise when belt is fastened or unfastened? | Yes | Excessive friction in belt guides - replace automatic seat belt (upper strap). Automatic reel is loose - tighten reel. Return spring broken - replace automatic seat belt (upper seat belt). |
| No |
| Is the plastic casing on the belt tongue free from damage in the area of the belt opening? | No | Replace complete automatic seat belt |
| Yes | ||
| Is the fully extended seat belt strap free from pinches, burn marks, tears and cuts, creasing and unraveling? |
No | Replace complete automatic seat belt |
| Yes | ||
| When the seat belt is fastened, is the belt tongue ejected by spring pressure from the buckle when the "red button" is pressed? | No | Replace complete automatic seat belt |
| Yes | ||
| Does fastened seat belt lock during emergency braking on a dry roadway at double walking speed? | No | Replace complete automatic seat belt |
| Yes | ||
| Is fully pulled-out seat belt strap free of serious dirt and other marks? | No | If dirt and marks cannot be removed with commercially available mild detergent, the automatic seat belt (upper seat belt) must be replaced. |
| Yes | ||
| In the case of seat-integrated seat belts, is front tongue of reclining mechanism or seat rail free of deformation? | No | Replace both damaged parts and complete automatic-reel seat belt. The following must also be checked and replaced, if necessary: seatbelt mounts on the vehicle body seatbelt mounts on the seat seat rails. |
| Yes | ||
| The automatic seat belt is OK! |
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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.