Genuine BMW 34-35-6-891-421 Rear Brake Pad Wear Sensor

The Genuine BMW 34356891421 is a rear brake pad wear sensor designed specifically for U11 X1 and U10 X2 models. This electronic sensor features a wire running at its tip that is fed by 12-volt power at all times, and when the brake pads wear down, the wire at the tip of the sensor cuts the circuit to alert the driver.

Key Features:

• Single-use component designed for one-time installation - heat and dust cause sensors to seize to brake pads and should always be replaced when installing new brake pads
• Mounts directly on the rear right brake caliper brake pad
• Contains a small wire that wears down with the brake pad until it makes contact with the metal rotor, grounding the electrical circuit and instantly triggering a dashboard warning light
• Provides 1,000 to 3,000 miles of safe driving notice to schedule service and protect rotors from expensive damage
• Factory BMW part ensuring proper fit and reliable performance

Using genuine BMW sensors is crucial for reliability, as the sensor quality directly impacts accuracy and system function. After sensor replacement, the CBS (Condition Based Service) system requires a professional reset using specialized diagnostic tools to clear the warning light and start a new monitoring cycle. This OEM sensor ensures your brake monitoring system functions correctly and provides accurate wear warnings for optimal safety.