BMW X3 E83 ABS, 4x4 and handbrake lights on
Why does the BMW X3 E83 ABS light come on with a rear wheel fault code?
Usually the cause is the wheel speed sensor or its tone ring. A ring swollen by rust or running out of true prevents the sensor from reading correctly, and the fault does not go away with new sensors until the ring is in good condition. The rear bearing can also be the cause. First read the fault code with a diagnostic tool.
What transfer case fault turns on the 4x4 and ABS lights?
The plastic gear of the four-wheel-drive actuator or its solenoid can wear, which turns on the 4x4, ABS and traction control lights. The actuator can also get stuck in the rear-wheel-drive position. The fix is to replace the worn part or the actuator.
Can you drive the car when the 4x4 and ABS lights are on?
While the lights are on, ABS, traction control and the four-wheel-drive function are out of use, so the car behaves worse on slippery roads. The fault should be sorted out soon. Use a quality part when replacing the sensor, not a cheap aftermarket sensor.