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SEN-2BWS0414• Front• Disc Brake Pad Wear Sensor
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GeoBrakes stocks OEM-grade disc brake pad wear sensors confirmed to fit the Bmw 640i Xdrive Gran Turismo, the single-use probe components that trigger your 640i Xdrive Gran Turismo dashboard warning light the moment your brake pads approach minimum thickness. Every sensor is direct-fit for the Bmw 640i Xdrive Gran Turismo
Standard/OE$18.03
10 items in stock
Select your vehicle to see compatible products and accurate pricing
A disc brake pad wear sensor on the Bmw 640i Xdrive Gran Turismo is your vehicle's advance warning system for brake pad replacement. It eliminates the need to rely on audible squealing from your 640i Xdrive Gran Turismo to know your pads are getting thin, instead triggering a dashboard warning light at a preset minimum thickness on the Bmw 640i Xdrive Gran Turismo, giving you time to plan the replacement before the pads wear through to the metal backing plate. Replacing a triggered sensor with every 640i Xdrive Gran Turismo pad change is the only way to keep that early-warning system working for the next service interval.
The wear sensor on the Bmw 640i Xdrive Gran Turismo is a small probe embedded in or clipped to the brake pad. When the 640i Xdrive Gran Turismo pad wears down to the replacement threshold, the probe contacts the rotor surface. This contact creates a circuit change that signals the Bmw 640i Xdrive Gran Turismo ABS or brake control module, illuminating the brake warning light. Once the probe on the Bmw 640i Xdrive Gran Turismo has contacted the rotor, it is destroyed and cannot be reused. It is a single-use component by design on the 640i Xdrive Gran Turismo.
Installing fresh brake pads on the Bmw 640i Xdrive Gran Turismo without fitting a new wear sensor defeats the entire purpose of having a brake monitoring system on your 640i Xdrive Gran Turismo. A previously triggered sensor probe is worn through and has no remaining material to detect the next set of 640i Xdrive Gran Turismo pads wearing down. From day one of the new Bmw 640i Xdrive Gran Turismo brake pads, the warning system is non-functional without a new sensor.
Wear sensor compatibility for the Bmw 640i Xdrive Gran Turismo is more exacting than most brake parts. The probe length, contact resistance specification, and connector design must all match the 640i Xdrive Gran Turismo brake monitoring circuit precisely. A wrong sensor triggers Bmw 640i Xdrive Gran Turismo warnings at the wrong pad thickness, or not at all. Every sensor in the GeoBrakes catalogue is sourced to original equipment probe and connector specifications for the Bmw 640i Xdrive Gran Turismo, with front and rear positions listed separately.
Do I need to replace the brake pad wear sensor every time I change pads on my Bmw 640i Xdrive Gran Turismo?
Yes, on Bmw 640i Xdrive Gran Turismo vehicles equipped with electronic wear sensors. The sensor probe on your 640i Xdrive Gran Turismo is a single-use component. Once it has contacted the rotor and triggered the 640i Xdrive Gran Turismo warning light, the probe is consumed. Always replace the Bmw 640i Xdrive Gran Turismo sensor during every pad change.
Does my Bmw 640i Xdrive Gran Turismo have electronic brake pad wear sensors?
Many vehicles use a mechanical wear indicator instead of electronic sensors. Check your Bmw 640i Xdrive Gran Turismo owner's manual or use the GeoBrakes vehicle selector to confirm whether your 640i Xdrive Gran Turismo uses an electronic pad monitoring system.
Can a faulty wear sensor keep the brake warning light on my Bmw 640i Xdrive Gran Turismo on after new pads are installed?
Yes. If the Bmw 640i Xdrive Gran Turismo wear sensor from a previous brake service was not replaced, or if the probe has been damaged on your 640i Xdrive Gran Turismo, the brake warning light will remain on even with new pads. Replacing the 640i Xdrive Gran Turismo sensor will clear the fault and restore normal operation.