X AUTOHAUX Belt Tensioner Assembly with Pulley for BMW X3 X5 M3 Z4 3-Series 5-Series 128i 323i 325i 325xi 328i 330xi 525i 528i 530i Mechanical Belt Tensioner No.11-28-7-530-314/11288624196
[Pros] Easy to install, manufactured according to the original dimensions, fully adapted.
[Function] a belt tensioner or/and idler pulley is a system that guides the serpentine belt and the timing belt on a car engine. The function of a pulley and a tensioner is to limit the belt slip. The belt tensioner can be mechanic (spring-loaded) or hydraulic.
[Package] 1x Serpentine Tensioner. Please confirm your car model and OE number before purchasing. Please check relevant operation video when you replace it.