why does my BMW 3 Series G20/G21 (2019-2024) traction control keep activating?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is turned off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Clean Wheel Speed Sensors

• Tools Required: Socket set, cleaning brush, brake cleaner.
• Remove the wheel covers/tires to access the wheel speed sensors.
• Inspect each sensor for dirt or damage; clean with brake cleaner as necessary.
• Reconnect any loose connectors and ensure the sensors are securely mounted.

3. Check Tire Pressure and Condition

• Tools Required: Tire pressure gauge.
• Use a tire pressure gauge to check the pressure of all four tires.
• Inflate tires to the manufacturer-recommended pressure (found on the driver’s door jamb).
• Inspect tires for uneven wear or damage; replace if necessary.

4. Alignment and Suspension Inspection

• Tools Required: Alignment tools (if available), visual inspection tools.
• Check the alignment of the front and rear wheels; look for signs of misalignment.
• Inspect suspension components, including struts, shocks, and control arms for wear or damage.
• Replace any worn components as needed.

5. Brake System Inspection

• Tools Required: Socket set, brake fluid tester.
• Check the brake fluid level and condition; replace if contaminated.
• Inspect brake pads and rotors for wear; replace if they are below the manufacturer’s specifications.

6. Software Update

• Tools Required: BMW diagnostic software or a compatible scanner.
• Connect the diagnostic tool and check for software updates available for the traction control system.
• Follow the manufacturer’s instructions to install any updates.