This Febi Bilstein Air Temperature Sensor is designed for use in air conditioning systems. It is a new, high-quality part with OE matching quality. The sensor has 2 connections and a weight of 0.010 kg. It is compatible with various Audi, Skoda, and VW models. Original part numbers include Audi 4A0 820 539 A, Skoda 4A0 820 539 A, and VW 4A0 820 539 A. It is also known as a Temperature Switch for air conditioning fan. Ensure compatibility with your vehicle before purchase. Professional installation is recommended. Products are typically supplied without fitting instructions.