This is a Gates engine thermostat with a part number of 352317100170. It operates electrically and opens at 97°C. It is designed for various BMW models including the 3 Series (E46), 5 Series (E60, E39), X3 (E83), Z3 (E36), Z4 (E85), X5 (E53), and 7 Series (E38, E65/E66/E67). It is also compatible with the Toyota RAV 4 III (ACA3_, ACE_, ALA3_, GSA3_, ZSA3_). The thermostat is supplied with a seal. It is also known by the part numbers 11530139877, 11531436823, 11531437040, and 11537509227. This part is essential for the engine cooling system.