This MAGNETI MARELLI engine thermostat is designed for a variety of VW, AUDI, and MERCEDES-BENZ models. Key specifications include a height of 25mm, an outer diameter of 35mm, and an inner diameter of 67mm. It comes with a seal and opens at 87°C. The thermostat is compatible with numerous engine numbers and Vehicle Identification Numbers (VINs), including specific ranges for VW Passat models, Audi A4, A6, A8, and others, as well as Mercedes-Benz M-Class and Skoda Superb. It is also listed for Fiat Bravo II, Toyota Previa III, Kia Pro Ceed, and Vauxhall Insignia. The part numbers associated with this thermostat are 077121113B, 078121113C, and 078121113F. It is a crucial component for the engine cooling system.