[dlee825]

Hello everyone, I have a 2013 335i sedan with m sport package and I need help with getting the right size rotors and pads. I just purchased this car and realized that the fronts have the larger gray brembo brake calipers and the rears have the stock non m sport calipers. Im not sure if the previous owner switched out the rears or if the car just came like this from factory. But for the time being i will just keep the setup like this. Can anyone here recommend me the right sizes for rotors? I believe the fronts use 370mm rotors and the rears use 340mm or 330mm rotors but just wanted to make sure before placing an order. Another question I had was, can I run smaller rotors on the front? Or would using the same sizes be best? If anyone can give me some advice or send me some links to purchase the right size rotors, that would be greatly appreciated! Appreciate everyones time, thank you!

[johnung]

Originally Posted by dlee825

Hello everyone, I have a 2013 335i sedan with m sport package and I need help with getting the right size rotors and pads. I just purchased this car and realized that the fronts have the larger gray brembo brake calipers and the rears have the stock non m sport calipers. Im not sure if the previous owner switched out the rears or if the car just came like this from factory. But for the time being i will just keep the setup like this. Can anyone here recommend me the right sizes for rotors? I believe the fronts use 370mm rotors and the rears use 340mm or 330mm rotors but just wanted to make sure before placing an order. Another question I had was, can I run smaller rotors on the front? Or would using the same sizes be best? If anyone can give me some advice or send me some links to purchase the right size rotors, that would be greatly appreciated! Appreciate everyones time, thank you!

The F30 335i with grey brake calipers has front 340mm x 30mm rotors and rear 330mm x 20mm rotors. Rotor size is specific to the caliper. You cannot use a different rotor size with your calipers.

Zimmermann makes high quality German made replacement rotors which you can get from FCP Euro.

https://www.fcpeuro.com/products/bmw...nn-34116792223

https://www.fcpeuro.com/products/bmw...nn-34216864899

You can get a big improvement in your brakes by getting rid of the stock pads that are no better than average and installing Hawk 5.0 pads.

Front Hawk 5.0 pads
(Ignore rear pads at this link)

https://m.tirerack.com/brakes/brakes...Hardtop+2+Door

Rear Hawk 5.0 pads- correct part number

https://m.tirerack.com/brakes/brakes...lar=Base+Model

[Jk808]

Old Post. I also bought a used BMW F30... This is the page that helped me figure out what was on my car.

https://www.bimmerworld.com/About-Us...-Sport-Brakes/