RH-3588 is an Arnott Ride Height Sensor for the front left side of the 2012-2018 Audi A6/A7; 2011-2018 Audi A8; 2014-2018 Audi RS7 and the 2013-2018 S6/S7/S8. Arnott¿¿¿s aftermarket ride height sensor is made from quality components including durable injection molded resin and rugged mounting points and is tested up to 1 million cycles for a long service life. Arnott's aftermarket ride height sensor measures the varying distances between the road and the vehicle's chassis to provide input to a vehicle¿¿¿s Electronic Control Unit (ECU) which then sends a signal to the air suspension compressor to fill or release air for the vehicle's air struts. Ride height sensors can wear out and are vulnerable to damage from road debris, accidents, water and salt intrusion. Shops should replace a faulty ride height sensor to prevent further damage to the vehicle's air suspension system.¿¿Arnott¿¿¿s aftermarket ride height sensor is backed by Arnott's industry leading warranty.