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.
Checking automatic belt device (locking effect)
The automatic belt device has two locking functions
- The first locking function is triggered by pulling the seat belt out quickly (belt extension acceleration).
Test
- Pull the seat belt out of the automatic belt device with a strong pull.
- If no locking effect occurs, the entire seat belt and belt buckle must be replaced.
- In the case of faults in the extension or retraction of the seat belt, check whether the locking tab of the automatic belt device is engaged correctly in the sheetmetal bracket on the body.
- The second locking function is triggered by a change in the sequence of vehicle movement (vehicle-dependent locking function).
Test
- Fasten the seat belt.
- Accelerate the vehicle to 20 km/h (12 mph) and then perform an emergency stop with the foot brake.
- If the belt is not locked by the blocking mechanism during the braking phase, the entire seat belt and belt buckle must be replaced.
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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.
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