Dynamic Friction 633-31085L Disc Brake Rotor - Front Left

Drilled and Slotted Front Left Rotor

The Dynamic Friction DFC Brake Rotor - Drilled and Slotted - Black, part number 633-31085L, is a vented front left disc brake rotor built for BMW applications that call for a 338 mm rotor with a 5-lug, 120 mm bolt circle. Its slotted X drilled surface and rust-resistant black zinc hat finish support consistent braking performance and corrosion protection in everyday driving.

Key Features

• Part number 633-31085L for front left fitment
• 338 mm outside diameter with 73 mm overall height
• Vented rotor construction
• Slotted X drilled braking surface
• Directional brake surface design
• Plain disc finish with zinc black hat finish
• Rust resistant coating included
• 5-bolt, 120 mm bolt circle and 79 mm center hole diameter

DFC Brake Rotor Line Details

The DFC Brake Rotor - Drilled and Slotted - Black line focuses on application-specific rotor geometry and finish selection. For BMW 135i, 135is, 328i, and 330i front-left applications, this rotor matches the listed dimensions and mounting pattern while using a black-coated hat for a cleaner appearance and added resistance to surface rust.

Fitment

• Fits 2008-2013 BMW 135i, front left. Notes: Optional design for full cast disc brake rotors; front rotors with original design aluminum hat.
• Fits 2013 BMW 135is, front left. Notes: Standard rotors; optional design full cast rotors; original design aluminum hat front rotors; original design aluminum hat front rotors with drilled slotted front, dimpled slotted rear.
• Fits 2007-2013 BMW 328i, front left. Notes: Sport Brakes Retrofit Kit; original design aluminum hat front rotors; optional design full cast rotors.
• Fits 2006 BMW 330i, front left. Notes: Sport Brakes Retrofit Kit; original design aluminum hat front rotors; optional design full cast rotors.

What This Rotor Helps Address

• Brake pulsation from worn or uneven rotor surfaces
• Reduced braking consistency from heat buildup
• Surface rust on exposed rotor hat areas
• Fitment issues when replacing a front left BMW rotor with the correct bolt pattern and dimensions
• Brake fade concerns during repeated stops

Installation Notes

Verify rotor diameter, height, center bore, and bolt pattern before installation. This rotor is listed for front left use only, so confirm the vehicle’s brake package and original rotor design notes before ordering. For BMW 135i, BMW 135is, BMW 328i, and BMW 330i applications, match the listed fitment details exactly to the vehicle’s brake setup.

Quality Assurance

Dynamic Friction identifies this rotor with a rust-resistant coating and zinc black hat finish for added corrosion resistance in service. Part number 633-31085L is built to the published dimensional specifications for the listed BMW front-left applications.