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.
Inclination sensor, function - GF80.50-P-4105-01PP
The electrodes in the ATA inclination sensor (B33) are immersed partially in an electrolyte (electrically conductive fluid). The ATA inclination sensor (B33) detects a change of the vehicle inclination due to the changes in the resistance between the electrodes. When the vehicle is parked, the value for the vehicle position is stored.
When the anti-theft alarm system (ATA) is activated and the vehicle is then moved by a certain inclination in the longitudinal direction or lateral direction, ATA inclination sensor (B33) transmits a signal to the rear SAM control module with fuse and relay module (N10/2) which then triggers an alarm.
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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.