why does my BMW 3 Series G20/G21 (2019-2024) display a lane departure warning alert?

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface.
• Disconnect the battery to prevent any electrical issues during the repair.

2. Clean and Inspect Front Camera

• Tools Required: Soft cloth, cleaning solution
• Carefully clean the front camera lens located behind the rearview mirror.
• Inspect the camera for any physical damage or misalignment.

3. Check and Adjust Sensor Alignment

• Tools Required: Torque wrench, socket set
• Inspect the mounting of the front sensors (if applicable) to ensure they are securely fastened.
• If misaligned, loosen the sensor mounting bolts, adjust to the correct position, and retighten to the manufacturer’s torque specifications.

4. Reprogram Lane Departure System (if necessary)

• Tools Required: BMW diagnostic tool (ISTA or similar)
• Connect the diagnostic tool to the OBD-II port.
• Navigate to the lane departure warning system settings and follow the prompts to reprogram or reset the system.

5. Test Drive

• Reconnect the battery.
• Perform a test drive to verify lane departure warning functionality, ensuring the vehicle remains centered in its lane.