This part is listed by BMW as BMW part number 34336799903 (34 33 6 799 903) and is described as the Brake Master Cylinder for F10 M5 and F06/F13 M6.
This is an OEM F10 M5 master cylinder manufactured by TRW - the original supplier to BMW for this part, as well as many other brake 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) > M5 (2013-2016)
6 Series
F12 / F13 (12-18) > M6