Gates hydraulic camshaft timing belt tensioner assembly for 1999–2006 Audi A4 with the 1.8L 4‑cylinder engine. This hydraulic tensioner assembly replaces the factory unit to maintain correct timing belt tension and support accurate valve timing. Supplied as a hydraulic assembly for the listed years and engine, it’s intended to restore consistent belt tension where the original hydraulic tensioner has worn or failed.

Gates 99-06 Audi A4 4-Cyl. 1.8L Cam. Tensioner Hyd. Assy. Timing Belt Tensioner