BOSCH 15321 Premium Original Equipment Oxygen Sensor Compatible with Select BMW 545i, 645Ci, 745i, 745Li, Alpina B7

[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, superior 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: verify specific fitment details, including sensor position, with fit checker above): BMW: 2004-05 545i, 2004-05 645Ci, 2004-05 745i, 2004-05 745Li, 2007-08 Alpina B7