Crankshaft Gear Pulley for 4cyl VW Diesel

Product Description

This gear is mounted on the end of the crankshaft of 4 cylinder VW Diesel engines (AAZ, 1Z, AHU). It drives timing and accessory belts. The integrated key on the back side can wear over time and lead to timing belt and engine failures.

Also replace its bolt: N 905 771 01