Fitment: for Audi A4 1.8L 2001-2005, for VW Passat GL, GLS 1.8L 01-05.
Material: This belt tensioner is made of metal material, which is wearable, durable and scratch-resistant.
Function: A belt tensioner 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 a mechanic (spring-loaded) or hydraulic.
Package Included: 1 Pcs Engine Timing Belt Hydraulic Tensioner Assembly.