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Replace Alternator Pulley

Model: Audi A3 MK 2, 8P - Years 2003-2013
Part: Alternator

Damage to the alternator pulley is a fairly common fault, and it tends to become particularly noisy. To replace it, first move the fuel filter by unscrewing the relevant mounting bolts without disconnecting the hoses; then loosen the auxiliary belt tensioner to free the pulley and use the appropriate tool to unscrew the pulley mounting bolt. Remove the old pulley and install the new one after verifying its compatibility (diameter and number of grooves), repositioning the belt and the filter.

Updated on 16 February 2026 by ScegliAuto

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