I have a complete(2 rotors and pads) rear brake kit for a 2011 335xi.I included links to see if these will fit your car. This was purchased from FCP Euro and I ended up selling the car before I could get around to installing these and the return period had expired.
Brake pads fitment chart
https://www.fcpeuro.com/products/bmw-disc-brake-pad-set-rear-330i-335i-335xi-330xi-335d-akebono-euro-eur1170#fitment
Rotor fitment
https://www.fcpeuro.com/products/bmw-disc-brake-rotor-rear-330i-330xi-335d-335i-335is-335xi-zimmermann-34216764655#fitment