【COMPATIBILITY-1】: The engine drive belt tensioner idler pulley serpentine belt drive component kit is compatible with BMW 2008-2013 128i 3.0L L6, 2006 325i/325xi/330i/330xi 3.0L L6, 2007-2013 328i 3.0L L6, 2009-2013 328i xDrive 3.0L L6, 2007-2008 328xi 3.0L L6, 2006-2007 525i/525xi/530i/530xi 3.0L L6, 2008-2010 528i 3.0L L6, 2009-2010 528i xDrive 3.0L L6
【COMPATIBILITY-2】: The engine drive belt tensioner idler pulley serpentine belt drive component kit is compatible with BMW 2008 528xi 3.0L L6, 2007-2010 X3 3.0L L6, 2007-2008 X5 3.0si 3.0L L6 (Not for cars with adaptive drive or 4-Zone automatic climatecontrol.), 2009-2010 BMW X5 xdrive30i 3.0L L6(Not for cars with adaptive drive or 4-Zone automaticclimate control.)
【Function】: This Belt Tensioner kit ensures that the serpentine belt maintains the correct tension, makes car runs smoother, the noise is reduced, to prevent the car from skidding
【Material】: Mainly made of aluminum and rubber, with a sturdy structure and wear resistance; The serpentine belt has good tension and is not easily deformed or broken
【Smooth Operation】: The tensioner pulley helps facilitate smooth operation of various engine accessories, such as the alternator, power steering pump, and A/C compressor, that the serpentine belt stays properly aligned and tensioned. The idler pulley can help improve drive system stability