The Outside Air Temperature Sensor by Rein Automotive, part number 8Z0-820-535, is designed for Audi and Volkswagen vehicles. This sensor is specifically a Temperature Sensor used in the HVAC system to measure the outside air temperature. It comes with a manufacturer's warranty of 2 years, providing peace of mind in terms of quality and durability. This genuine part ensures accurate temperature readings for optimal performance of the vehicle's air conditioning and heating system.