This part is listed by BMW as BMW part number 11287582766 (11 28 7 582 766) and is described as OEM Idler Pulley for BMW F10 528i and F25 X3 28i with the N52 6-cylinder engine (not for turbo 4-cylinder models with the same name).
This is an OEM Idler 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:
5 Series
F10 / F11 (11-16) > 528i N52 (2011)
X3 Series
F25 X3 (2011-2017) > X3 xDrive28i