what does the C0035 code mean for my BMW 3 Series G20/G21 (2019-2024) and how to fix it?

Solution

1. Preparation

• Gather all tools and parts before starting the repair.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.
• Disconnect the negative terminal of the battery to prevent electrical shorts.

2. Inspect and Replace Wheel Speed Sensor

1. Remove the Wheel

   • Use a jack to lift the front of the vehicle and secure it on jack stands.
   • Remove the wheel lug nuts with a socket wrench and take off the wheel.

2. Access the Wheel Speed Sensor

   • Locate the wheel speed sensor near the brake rotor, typically mounted on the wheel hub or control arm.
   • Disconnect the wiring harness from the sensor by pressing the release tab.

3. Remove the Old Sensor

   • Unscrew the sensor from its mounting point using the appropriate socket or wrench.
   • Carefully pull the sensor out of its housing, taking care not to damage adjacent components.

4. Install the New Sensor

   • Insert the new wheel speed sensor into the mounting hole.
   • Secure it in place by tightening the mounting bolt to the specified torque value (consult the service manual for the exact torque specification).
   • Reconnect the wiring harness to the new sensor.

3. Reassemble and Test

1. Reinstall the Wheel

   • Place the wheel back onto the hub and hand-tighten the lug nuts.
   • Lower the vehicle off the jack stands and then tighten the lug nuts to the specified torque.

2. Reconnect the Battery

   • Reconnect the negative terminal of the battery.

3. Clear Codes and Test Drive

   • Use the OBD-II scanner to clear the C0035 code.
   • Take the vehicle for a test drive to ensure the ABS and DSC systems are functioning correctly.