[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 percent 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 easy Compatible with select vehicles (Note: engine may affect fitment - verify specific fitment details, including sensor position, with fit checker above): BMW: 2014-16 228i, 2015-16 228i xDrive, 2013-18 320i, 2013-18 320i xDrive, 2012-16 328i Compatible with (continued): BMW: 2014-16 328i GT xDrive, 2013-16 328i xDrive, 2014-16 428i, 2015-16 428i Gran Coupe, 2014-16 428i xDrive, 2015-16 428i xDrive Gran Coupe, 2012-16 528i, 2012-16 528i xDrive, 2013-15 X1, 2013-17 X3 Compatible with (continued): BMW: 2015-18 X4, 2016-18 X5, 2012-16 Z4