my BMW 3 Series F30/F31 (2012-2019) stability control light is on, what does it mean?

Solution

1. Preparation

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

2. Inspect and Repair Wheel Speed Sensors

• Locate the wheel speed sensors on each wheel.
• Check for any visible damage or disconnections in the wiring harness.
• Use a multimeter to test the sensor's resistance (should be within manufacturer specifications).
• If faulty, replace the wheel speed sensor with a new one:
  • Remove the old sensor by unscrewing it from the hub.
  • Install the new sensor and secure it to the hub with the appropriate torque specifications.

3. Check Brake Fluid Level

• Open the hood and locate the brake fluid reservoir.
• Inspect the fluid level; if it's low, top it up with the recommended brake fluid (DOT 4).
• If fluid is consistently low, inspect for leaks in the brake lines or calipers.

4. Test Stability Control System

• Reconnect the battery terminal.
• Start the vehicle and check if the stability control light is still illuminated.
• If it remains lit, use the OBD-II scanner to clear any stored codes and recheck for new codes.

5. Verify Tire Condition

• Inspect all tires for proper inflation according to the manufacturer's specifications.
• Check for uneven wear or damage; replace tires if necessary to ensure optimal traction.