how to fix BMW X3 G01 (2018-2024) ABS light that won’t turn off

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface with the ignition off.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Inspect and Clean ABS Wheel Speed Sensors

• Sub-steps:
  1. Locate the wheel speed sensors at each wheel hub.
  2. Remove the sensor mounting bolts using a socket set.
  3. Gently pull the sensor out; clean any debris or dirt using a soft cloth.
  4. Reinstall the sensor and secure it with the mounting bolts.
• Tools Required: Socket set, soft cloth.

3. Check and Refill Brake Fluid

• Sub-steps:
  1. Locate the master cylinder reservoir.
  2. Remove the cap and check the brake fluid level; add DOT 4 brake fluid if low.
  3. Replace the cap securely after refilling.
• Tools Required: Brake fluid (DOT 4), funnel.

4. Inspect ABS Control Module and Wiring

• Sub-steps:
  1. Locate the ABS control module, typically found near the brake master cylinder.
  2. Visually inspect for any corrosion or damage.
  3. Check the wiring harness for frays or disconnections; repair or replace as necessary.
• Tools Required: Multimeter for continuity testing.

5. Clear Error Codes and Test Drive

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear any stored error codes.
  3. Start the vehicle and perform a test drive to verify that the ABS light remains off.
• Tools Required: OBD-II scanner.