This part is listed by BMW as BMW part number 12317605061 (12 31 7 605 061) and is described as OEM Overrunning Alternator Pulley for BMW F22 228i, F30 320i/328i, F32 428i, F10 528i, E84 X1, F25 X3, F26 X4, E89 Z4 with the N20/N26 4-cylinder turbo engine.
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 Overrunning Alternator Pulley manufactured by INA Schaeffler - the original supplier to BMW for this part, as well as many other engine components. 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.
BMW Fitments:
2 Series
F22 / F23 (2014-2021) > 228i
F22 / F23 (2014-2021) > 228i xDrive
3 Series
F30 / F31 / F34 (2012-2019) > 320i
F30 / F31 / F34 (2012-2019) > 320i xDrive
F30 / F31 / F34 (2012-2019) > 328i
F30 / F31 / F34 (2012-2019) > 328i xDrive
4 Series
F32 / F33 / F36 (14-20) > 428i
F32 / F33 / F36 (14-20) > 428i xDrive
5 Series
F10 / F11 (11-16) > 528i N20 (2012-2016)
F10 / F11 (11-16) > 528i xDrive N20 (2012-2016)
X1 Series
E84 X1 (2013-2015) > X1 28i
E84 X1 (2013-2015) > X1 28i xDrive
X3 Series
F25 X3 (2011-2017) > X3 sDrive28i
F25 X3 (2011-2017) > X3 xDrive28i
X4 Series
F26 X4 (2015-2018) > X4 28i xDrive
Z Series
E89 Z4 (2009-2016) > Z4 sDrive28i