Genuine BMW ABS Wheel Speed Sensor - 34523420331: Genuine BMW ABS Wheel Speed Sensor - 34523420331 is a direct replacement for the original part, designed to help maintain the original performance of your BMW. This wheel speed sensor helps to monitor the rotational speed of the wheel, providing information to the ABS system to help it work correctly. It is an OEM part, designed to fit and function perfectly with your BMW.