Applicable Models:Replacement for 540i 1997-2003,545i 2004-2005,550i 2006-2010,645Ci 2004-2005,650i 2006-2010,740i 1997-2001,740iL 1997-2001,745i 2002-2005. Fit Vehicles:Compatible with 745Li 2002-2005,750i 2006-2008,750Li 2006-2008,Alpina B7 2007-2008,M5 2000-2003,X5 2000-2010,Z8 2000-2002. Product Advantages :Sianxaido Knock Detonation Sensor are manufactured from qualitative materials to ensure reliability, durability and performance. Installation method: Directly replace the original parts, easy to operate, convenient installation. Note: Please check the vehicle model, corresponding year, reference number is correct, and the corresponding plug interface part before purchasing. If you have any questions, please tell us. Brand Name Sianxaido Item Weight 5.76 ounces Manufacturer Sianxaido