Alternator belt tensioner replacement on Volkswagen Passat B5

Replacing the alternator belt tensioner on a Volkswagen with the 1.9 TDI AFN engine is possible without removing the vehicle's front end.

The tensioner ensures the necessary tension of the drive belt, which transmits torque to the alternator to power electrical appliances and charge the battery. If the mechanism is worn, the alternator cannot perform its functions correctly.

This guide demonstrates how to change the tensioner on a VW Passat B5. All operations are carried out under the bonnet. No special skills are required: you simply need to remove the belt, dismantle the old tensioner and install the new one.

I also recommend reading the article on alternator faults. It covers diagnostic principles and causes of breakdown.

Which alternator belt tensioner should be installed on a Volkswagen Passat B5?

The original tensioner part number (complete with roller) is 028903315M.

Equivalents:

• JP GROUP 1118200500

• INA 534018510

• SNR GA357.15