The Genuine OEM Mahle Behr Thermostat with O-Ring is a direct replacement part designed specifically for BMW E34, E36, Z3, and M3 models. Made in Germany, this thermostat insert comes with a Gasket seal type and an O-Ring included for easy installation. With a start to open temperature of 88 degrees, this thermostat is lightweight at 0.273 lbs and has dimensions of 2.56 x 2.28 x 2.76. It comes with a 1-year manufacturer warranty and is a reliable choice for maintaining optimal engine temperature control.