Dynamite Friction 631-31097L Disc Brake Rotor - Front Left

Drilled and Slotted Front Left Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver, part number 631-31097L, is a vented front left disc brake rotor built for BMW applications that call for a 348 mm rotor with a 5-lug, 120 mm bolt circle. Its slotted X drilled surface and zinc silver hat finish are paired with a rust-resistant coating for a clean, service-ready appearance.

Designed for 2011-2019 BMW 535i, 535i xDrive, 535d, 535d xDrive, ActiveHybrid 5, 640i, 640i xDrive, 640i Gran Coupe, and 640i xDrive Gran Coupe front left positions, this rotor supports OE-style fitment details including applications with aluminum hat rotors and disc brake pad wear sensor notes where listed. Part number 631-31097L is a direct match for the specified front left brake position in the listed BMW models.

• Slotted X drilled braking surface for consistent rotor cleaning
• Vented disc brake rotor design for front axle heat management
• 348 mm outside diameter with 30 mm nominal thickness
• 28.4 mm discard thickness specification
• 5-bolt pattern with 120 mm bolt circle diameter
• Zinc silver hat finish with rust-resistant coating
• Directional brake surface design
• Plain disc finish with 75 mm center hole diameter

DFC Brake Rotor Line Details

The DFC Brake Rotor - Drilled and Slotted - Silver line focuses on OE-style rotor dimensions with a performance-oriented surface pattern. For BMW 535i, 640i, and ActiveHybrid 5 front brake service, the line combines a vented rotor structure with drilled and slotted machining to maintain a stable braking surface while matching the listed fitment requirements.

What This Rotor Helps Address

• Brake pulsation caused by worn or uneven front rotors
• Reduced braking consistency from heat buildup in daily driving
• Surface glazing and pad transfer on the rotor face
• Corrosion on exposed rotor hat areas
• Front left rotor replacement needs on BMW 535i, 535d, 640i, and ActiveHybrid 5 models

Installation Notes

Verify rotor diameter, bolt circle, center hole diameter, and thickness before installation. This rotor is listed for the front left position only, so confirm side and axle placement against the vehicle service information. Fitment notes reference both aluminum hat and full cast rotor configurations on select BMW applications, including models such as the BMW 640i Gran Coupe and BMW 535i xDrive. Part number 631-31097L should be matched to the exact brake package and sensor-related notes shown for the vehicle.

Quality Assurance

Dynamite Friction supplies this rotor with a rust-resistant coating and zinc silver hat finish to support long-term appearance and serviceability. The listed dimensions and directional slotted/drilled surface are provided to align with the specified BMW front brake applications.