Every TRW part has four levels of testing/technical/audit review before approval is given including endurance testing of 500K cycles Low friction polymer or high quality bearings enhance steering performance Manufactured with built-in rubber bushings or premium steel and polymer joints, designed to the latest high performance designs with OE quality materials For confirmed fitment of this TRW Suspension Stabilizer Bar Link Kit please verify your vehicle with the Amazon 'Check Fit' option Fits: BMW 525xi: 2006 - 2007, BMW 528i xDrive: 2009 - 2010, BMW 528xi: 2008, BMW 530xi: 2006 - 2007, BMW 535i xDrive: 2009 - 2010, BMW 535xi: 2008