Alternator Pulley, OEM - E82 135i N54, E9X 335i N54, E60 535i, E70 X5 3.0si

OEM replacement alternator pulley for the N54 engine used in E82 135i, E9X 335i/335is, and E60 535i. It's also used on some E70 X5 3.0si. This pulley fits cars with a Bosch alternator and 7-rib belt.

This pulley is known as a overdriving, decoupling, OAD, or ADP pulley and has an internal dampening system that can wear out or fail. This can cause improper belt tension, vibration, slipping, noise, and poor alternator performance. There is no suggested replacement interval so check the overall condition of the pulley and listen for buzzing or squealing noises from the pulley itself. Removal and installation requires a special tool - see Related Items below.

This is an OEM alternator pulley manufactured by INA - the original supplier to BMW for this part, as well as many other pulleys and bearings. As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.