
The Gates idler pulley for 2009–2012 Audi A4 4‑cyl 2.0L applications is an idler for the engine's belt drive system that routes and supports the accessory belt. Intended for the specified A4 model years and engine, it helps maintain proper belt alignment and routing for accessories driven by the grooved belt in this engine family.
Gates 09-12 Audi A4 4-Cyl. 2.0L Idler Belt Drive Pulley