OEM alternator decoupler pulley for Audi a4 and VW Passat applications.

It is recommended that you change the decoupler pulley every 100K miles, or when it fails, to prevent excess wear on the belt drive system. Using OEM parts will guarantee that they are the same quality as what your car came with from the factory.

Note: this is a new OEM pulley. Due to superscessions and different factories the part number and country of manufacture may vary from the photos, but I guarantee it will be a new OEM INA brand pulley which is the top quality brand used originally by the Volkswagen auto group for their cars.