The alternator keeps the battery in a constant state of charge anytime the engine is running. If your lights are dimming or you hear excessive bearing noise around the alternator, chances are that it's time for a replacement.
This OEM alternator pulley has a ratcheting mechanism inside that can wear out, causing a rattling sound. This mechanism allows the alternator to freewheel to a degree. This is only for the Valeo brand alternator/
This item fits the following BMWs: 2008+ E82 BMW 128i with N51 engine 2006-2007 E90 BMW 325i 325xi 330i 330xi - Sedan 2006-2007 E90 BMW 328i 328xi - Sedan with N51 engine 2006-2007 E91 BMW 325xi - Wagon 2007-2007 E92 BMW 328i 328xi 328i xDrive - Coupe with N51 engine 2006-2007 E60 BMW 525i 525xi 530i 530xi Show More Show Less
Whether you're replacing a failing alternator pulley or performing preventive maintenance, this Alternator Pulley ensures your BMW continues to perform with factory precision and reliability.
