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.
Seat belt reminder
The seat belt reminder reminds the driver to put on the seat belt. There are two versions of the seat belt reminder - European and American. They are slightly different, which is outlined below. The signals which indicate the variant in the car (European or American) are transmitted by the central electronic module (4/56) via the Control Area Network (CAN). Two small symbols light in the upper electronic module (4/70) and indicate when a seat belt is not fastened. The driver information module (5/1) emits an audible signal to warn the driver that no seat belt is fastened. From model year 2002 inclusive, there is also a display on the combined instrument panel (5/1) which warns the driver if their belt is not fastened.
European versionÂ
If the seat belt is not fastened when the ignition is switched on, the symbols in the upper electronic module will light and there will be an audible signal from the driver information module. This continues for 6 seconds until either the seat belt is fastened or reverse gear is selected. If the car travels at 10 km/h or more, the audible signal reactivates if the driver has not fastened his/her seat belt.
American versionÂ
When the ignition is switched on, the symbols in the upper electronic module will light continuously for 6 seconds, or until the driver's seat belt is fastened. At the same time there will be a ringing sound from the driver information module for the same period of time. If the driver releases the belt after fastening it, the audible signal will not resume if more than 6 seconds have passed since the ignition was switched on.
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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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