Genuine BMW 640i xDrive Speed Sensor

The BMW 640i xDrive Speed Sensor takes instant wheel and vehicle speed data to help the car tighten traction control and shave braking distance. Each Speed Sensor measures the passing of teeth that are sitting just millimeters from a ferromagnetic toothed ring. As a result, a movement is transformed into a sharp electrical pulse. This is emitted to the ABS, stability logic, and shift maps in a blink. The early passive units were effective at highway pace, but the current active Speed Sensor in every 640i xDrive cleans the signals even at a crawl. It filters out incorrect inputs in heavy rain or swirling snow. The Speed Sensor maintains precision under extreme heat and vibrations thanks to Hall effect and magnetoresistive elements. This ensures the seamless ride that drivers expect from BMW grand tourers. Compatibility extends to the coupe, Gran Coupe, and convertible versions of the 640i xDrive over multiple production years, so a replacement Speed Sensor will integrate with modules and dash displays. The 640i xDrive's four wheel units form a BMW network that employs a central Speed Sensor to transmit accurate road speed. It does so for adaptive suspension and turbo management, improving corner exits, agility, and fuel economy. Because the Speed Sensor reacts in milliseconds, the traction control steps in sooner, collision avoidance calculates stopping room earlier, and cruise assist maintains gaps more smoothly, improving everyday safety. An additional remarkable advantage is the broader air gap tolerance of the active Speed Sensor, which maintains the confidence of the 640i xDrive even if mud or ice coats the hub. BMW is known for durable electronics, and this part continues that tradition with corrosion resistant housings and sealed connectors. For as long as the car runs, the objective of each BMW is to provide performance without the irritation of downtime, enabling the speedy 640i xDrive to act like a true BMW, energetic yet efficient, and stable on any surface.

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