Front Left M-Sport Brake Rotor (1pc), Zimmermann - G42 G20 G22/G26 G23 G30 G12 G15 G05

This part is listed by BMW as BMW part number 34106875283 (34-10-6-875-283) and is described as a left front brake disc for select G42, G20, G22, G23, G30, G12, G15, G05 models. It's 374x36mm with the original-style 1-piece casting that is less expensive than the original without giving up any performance for normal use.

Fitment Details:
G42 M240i with optional Motorsport S33TA brakes.
G20 M340i with optional Motorsport S33TA brakes.
G30 530i/540i/M550i with optional M Performance or S2NH brakes.
G11/G12 740i/750i with optional M Performance or S2NH brakes.
G11/G12 M760Li and Alpina B7 standard brakes.
G05 X5 50i with standard brakes.

Purchasing OEM-spec rotors guarantees high-quality castings and high tolerances to reduce warping and vibration while also ensuring an exact fit. These rotors work well with any street, street/track, or dedicated track/race pad sets in our catalog. These rotors typically hold up well to the stresses of track and autocross use very well; we do recommend floating and/or slotted rotors for customers using their cars on track regularly.

1-piece Rotor. This rotor is a single-piece cast iron rotor. The factory BMW rotor is a 2-piece iron disc with an aluminum hub. BMW advertised the lighter weight as a way of lowering emissions and improving fuel economy. There is likely no performance difference between them but this will be slightly heavier compared to stock. We also offer the Original BMW rotors if you wish to keep the lighter two-piece design.

This brake rotor is manufactured by an original supplier to multiple German makes for many 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.