Keep an eye on your brake health with the Bosch AP804 Wear Sensor! This little device is crucial for your car's safety—it monitors the brake lining and triggers a dashboard warning when the pads are worn down and need replacing. The sensor is 685mm long and designed to match original equipment specs, so it fits perfectly and works reliably with your vehicle's electronics. Made from high-quality materials, it's heat-resistant and has extra-strong cables to prevent failure from rubbing or high temps. Please note: compatibility varies by car, so double-check your vehicle identification before ordering. Installation should be done by a trained specialist to ensure it's set up correctly and safely. This is a single sensor (1 piece), ideal for when you're doing brake maintenance and need to replace the old indicator. Don't ignore that warning light—swap in a Bosch sensor and drive with confidence knowing your brakes are being monitored accurately. A small part that makes a big difference for safety!