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.
Position sensor, suspension
There are two position sensors at the rear suspension. The position sensor measure the position of the right and left-hand control arms in relation to the car body. The vertical position of the shock absorber is calculated based on this position. The sensors are supplied with 5 V by the suspension module (SUM). When the vehicle is stationary, the output signal from the sensors is approximately 2-3 V. When there is vertical movement the signal will oscillate around these values; the greater the movement the greater the deviation.
The values move in different directions on the left and right-hand sides. Upwards body movement results in increased voltage on the left-hand side and a voltage drop on the right-hand side.
There are diagnostics for the position sensors, which must be calibrated after replacement.
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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.