[INNOVATIVE TECHNOLOGY] - Every Bosch Oxygen Sensor benefits from the technological and manufacturing experience gained from decades of production since first inventing the Oxygen Sensor in the late 1960's, ensuring long-lasting performance [FACTORY TESTED] - Seared appearance of protection tube is a result of a 100 % fully functional quality test to ensure every Bosch manufactured sensor meets Bosch's rigorous standards for quality and performance [STAINLESS STEEL BODY] - Exclusive double laser-welded stainless steel body is totally submersible and sealed tight to protect against damage from exhaust emissions - ensuring longer sensor service life [FAST ACTING HEATER] - Fast-acting heater optimizes sensor operation on Planar and 3, 4, and 5 wire Thimble type sensors allowing the oxygen sensor to reach its operating temperature quicker - within seconds - for optimum performance [READY TO INSTALL] - True Direct-fit OE connectors and harnesses, along with threads pre-coated with anti-seize compound right out of the box, make installation simple and hassle-free Compatible with select vehicles (Note: Engine affects fitment - verify specific fitment details, including sensor position, with fit checker above): BMW: 2016-18 340i, 2017-19 340i GT xDrive, 2016-18 340i xDrive, 2017-20 440i, 2017-20 440i Gran Coupe Compatible with (continued): BMW: 2017-20 440i xDrive, 2017-20 440i xDrive Gran Coupe, 2017-20 540i, 2017-20 540i xDrive, 2018-19 640i xDrive Gran Turismo, 2016-20 740i, 2017-20 740i xDrive, 2017-21 M240i, 2017-21 M240i xDrive, 2018-21 X3, 2019-21 X4 Replaces the following Original Equipment part number: 11788644371