Brembo 09.B337.2X Disc Brake Rotor - Front

Brembo UV Coated Front Brake Rotor

The Brembo Premium Xtra Cross Drilled UV Coated Rotor is a direct replacement front disc brake rotor built to meet or exceed OEM specifications. It combines a drilled braking surface, UV rust-resistant coating, and high carbon cast iron construction where applicable to help maintain consistent braking feel on BMW 230i, 330i, 430i, 328i, 328i xDrive, and other listed applications.

Part number 09.B337.2X is engineered for drivers who want OE-style fitment with added corrosion protection and a performance-oriented rotor design. Brembo’s UV-coated rotor line focuses on clean installation, stable operation, and long-term surface protection.

Key Features

• Part number: 09.B337.2X
• Premium Xtra Cross Drilled design for the front axle
• UV coated rust-resistant surface for added disc protection
• High carbon cast iron construction where applicable to reduce noise and vibration
• Vented rotor design with drilled braking surface
• Outside diameter: 312 mm
• Nominal thickness: 24 mm; minimum thickness: 22.6 mm
• Centering diameter: 79 mm
• Five-lug fitment with 120 Nm torque spec
• Fixing screws included

Product Details

Brembo developed this rotor as a direct replacement for select BMW front brake applications, including 2017-2021 BMW 230i, 2017-2020 BMW 430i, 2012-2018 BMW 328i, and related xDrive and Gran Coupe models listed in the fitment data. The UV coating helps protect the braking plate surfaces from corrosion, while the drilled braking surface supports heat management and a more consistent pedal response. For restored braking performance, Brembo recommends replacing rotors and pads together, and pairing this rotor with Brembo NAO/Ceramic or Low Met brake pad formulations.

This part cross-references Hella Pagid 355123002 and PowerStop EBR858 for the same application. The Brembo 09.B337.2X rotor is also listed across multiple aftermarket interchange references for select BMW front brake setups.

What It Helps Address

• Brake pulsation from worn or uneven front rotors
• Surface rust on exposed rotor areas
• Noise and vibration during braking
• Reduced braking consistency from heat-affected rotors
• Brake performance loss when replacing pads without matching rotor service

Installation Notes and Tips

Verify rotor dimensions, hub centering diameter, and vehicle brake package before installation. This rotor is listed for front position applications only and includes fitment exclusions for certain blue caliper and Sport Package (M) configurations on some BMW models. Clean the hub mounting surface before installation, follow the specified 120 Nm torque value, and replace pads at the same time when restoring braking performance.

Quality Assurance

Brembo manufactures this UV coated rotor as an OEM-spec replacement part with corrosion protection, intelligent wear marking location, and application-specific fitment data for BMW front brake systems. Part number 09.B337.2X is built to Brembo’s braking standards for direct replacement use.