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KSE-100099• Front• Disc Brake Pad Wear Sensor Kits
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GeoBrakes stocks disc brake pad wear sensor kits confirmed to fit the Bmw 420i Gran Coupe, combining the wear sensor probe manufactured to the exact OEM probe length and contact resistance for the 420i Gran Coupe with connector hardware, retaining clips, and in pad-inclusive configurations the brake pads themselves, so the complete brake monitoring system on your Bmw 420i Gran Coupe is restored correctly in a single service.
Standard/OE$32.30
10 items in stock
Select your vehicle to see compatible products and accurate pricing
Standard/OE$67.03
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Standard/OE$34.72
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A brake pad wear sensor kit for the Bmw 420i Gran Coupe does one critical thing that a pad change alone cannot: it ensures the brake warning light on your 420i Gran Coupe dashboard accurately reflects the condition of the next set of brake pads. Without a new sensor on the Bmw 420i Gran Coupe, the warning system is non-functional from day one of the new pads, there is no advance notice for the next replacement cycle on your 420i Gran Coupe. On Bmw 420i Gran Coupe vehicles where a previous service skipped the sensor, the brake warning light may also remain on permanently after new pads are installed on the 420i Gran Coupe.
The kit for your Bmw 420i Gran Coupe includes the brake pad wear sensor probe unit manufactured to OEM contact resistance and threshold depth for the 420i Gran Coupe monitoring circuit, the wiring connector mating with the Bmw 420i Gran Coupe brake monitoring harness where required, the retaining clip or mounting bracket securing the sensor to the 420i Gran Coupe brake pad or caliper correctly, and in pad-inclusive kits, the brake pads for the Bmw 420i Gran Coupe with sensor pre-assembled at factory-correct position on the 420i Gran Coupe pad.
A brake pad wear sensor on the Bmw 420i Gran Coupe is a calibrated component manufactured to trigger the 420i Gran Coupe brake warning circuit at a specific remaining pad thickness. Too long and it triggers early on your Bmw 420i Gran Coupe, sending drivers for an unnecessary brake service with significant 420i Gran Coupe pad life remaining. Too short and it triggers late or not at all on the 420i Gran Coupe, leaving the driver with no advance warning as the Bmw 420i Gran Coupe pads approach the metal backing plate.
Wear sensor compatibility for the Bmw 420i Gran Coupe is more exacting than most brake components. Probe length, contact resistance specification, and connector pinout must all match the 420i Gran Coupe brake monitoring circuit exactly. A wrong-spec sensor on your Bmw 420i Gran Coupe either triggers warnings at the wrong pad thickness or fails to connect to the existing 420i Gran Coupe harness. Every kit in the GeoBrakes catalogue is sourced to OEM specification for the Bmw 420i Gran Coupe exact year and model, with front and rear positions listed separately.
How do I know if my Bmw 420i Gran Coupe has electronic brake pad wear sensors?
Check your Bmw 420i Gran Coupe owner's manual for a brake pad warning light in the instrument cluster section. Use the GeoBrakes vehicle selector to confirm whether your Bmw 420i Gran Coupe application requires an electronic sensor kit.
Can I buy the wear sensor separately from the brake pads for my Bmw 420i Gran Coupe?
Yes. GeoBrakes carries sensors as standalone components and as part of sensor kits for the Bmw 420i Gran Coupe. If replacing 420i Gran Coupe pads that did not include a sensor and the existing sensor has already triggered, a standalone sensor or sensor kit is the correct purchase for your Bmw 420i Gran Coupe.
Will the brake warning light turn off automatically after installing a new sensor on my Bmw 420i Gran Coupe?
On most Bmw 420i Gran Coupe vehicles, the brake pad warning light turns off once the new sensor is correctly installed and the ignition is cycled. On some Bmw 420i Gran Coupe European platforms, a diagnostic scan tool reset may be required. Check your 420i Gran Coupe service documentation if the light does not clear after installation.