my BMW 3 Series G20/G21 (2019-2024) forward collision warning keeps activating, what should I check?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the ignition is off.
• Disconnect the battery to prevent electrical shorts during inspection.

2. Inspect and Clean Sensors

• Locate the front sensors and camera, typically positioned near the grille and windshield.
• Use a soft cloth and appropriate cleaner to gently clean the sensor surfaces.
• Ensure no obstructions are present that could hinder sensor performance.

3. Check Alignment

• Using a laser alignment tool, verify that the sensors and camera are aligned properly according to the manufacturer's specifications.
• If misaligned, adjust the mounting brackets or hardware as necessary to achieve correct positioning.

4. Recalibrate System

• Reconnect the battery and power on the vehicle.
• Use the manufacturer’s diagnostic tool to perform a recalibration of the forward collision warning system.
• Follow on-screen prompts to complete the calibration process.

5. Perform Test Drive

• Take the vehicle for a test drive in a controlled environment to check if the forward collision warning system operates correctly.
• Monitor the functionality of adaptive cruise control during the drive.