[johnung]

Originally Posted by BWbimmer

The rear calper gives it away, 2 piston = M sport brakes:

https://www.realoem.com/bmw/enUS/sho...diagId=03_0108

The wheels fitting the calipers are mentioned too

Having the rear Brembo two-piston caliper over 345mm x 24mm rotors is definitely the M Sport (blue) or M Performance (red, orange or yellow) brake. But if the front calipers are blue, they can either be 370mm or 340mm. Red/yellow/orange fronts are 370mm.

Can either measure the blue front rotor diameter, or look at the raised lettering on the rear caliper casting to see if they say "340" or "370/380"