21.ANTI-LOCK BRAKE SYSTEM (ABS) Downtown 300i ABS WHEEL SENSOR REMOVAL & INSPECTION Front Wheel Speed Remove the front wheel speed sensor. Install the front wheel speed sensor. Front Wheel Speed Sensor Rotor Remove a bolt attaching to the front wheel speed sensor Front Wheel speed Sensor's connector Remove the connector of front wheel speed sensorStandard clearance: Less than 0.8mm between the Front wheel speed sensor and Front Wheel Speed Sensor Rotor 21-4