This is an air temperature sensor for the 2.0 TFSI, 1.8T and the 2.7L turbo engine. The sensor has a significant influence on good engine running and should be replaced regularly! Oval plug: All 1.8T from 02.09 All 2.0T FSI up to 09 Rectangular plug: 1.8T , 2.7T engines up to 02.09 Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com