Dynamite Friction 631-31099D Disc Brake Rotor - Front Left

Drilled and Slotted Front Left Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver, part number 631-31099D, is a front left disc brake rotor built for BMW applications that call for a 348 mm rotor with a directional slotted and drilled surface. It features a zinc silver hat finish, rust resistant coating, and a plain disc finish for a clean OE-style appearance with added corrosion protection.

Designed for BMW 535i, 550i, 740i, 650i, and ActiveHybrid 7 front left fitments, this rotor supports direct replacement service across aluminum hat and full cast rotor configurations listed in the fitment data. The 631-31099D rotor is a practical choice when you need a drilled and slotted front brake rotor for BMW 650i Gran Coupe, BMW 535i GT, or BMW 740Li applications.

Key Features

• Part number 631-31099D
• Front left disc brake rotor for BMW applications
• 348 mm outside diameter
• Directional slotted X drilled surface for consistent brake contact
• Zinc silver hat finish with rust resistant coating
• Plain disc finish
• Discard thickness: 34.4
• Fits aluminum hat rotor and full cast rotor configurations listed in the fitment data

Product Details

The DFC Brake Rotor - Drilled and Slotted - Silver is built around the listed rotor dimensions and surface design to serve as a direct-fit front left replacement on select BMW models from 2010-2018. The drilled and slotted braking surface helps maintain a clean pad interface, while the directional pattern supports consistent rotor operation under repeated braking. The silver zinc hat finish and rust resistant coating add protection where corrosion commonly starts, especially around the hub area.

Fitment includes BMW 535i GT, 535i GT xDrive, 535i, 550i, 550i xDrive, 650i, 650i xDrive, 650i Gran Coupe, 650i xDrive Gran Coupe, 740i, 740Li, 740Li xDrive, 740Ld xDrive, and ActiveHybrid 7 front left applications. Part number 631-31099D is listed for both aluminum hat original-design rotors and optional full cast rotor designs where noted.

Common Brake Service Uses

• Replacing a worn or below-spec front left rotor
• Addressing brake pulsation caused by rotor wear or uneven surface condition
• Restoring braking performance after heat checking or surface scoring
• Replacing a corroded rotor hat on BMW front brake service
• Updating a BMW 650i, 535i, or 740i front brake setup with a drilled and slotted rotor

Installation Notes

Verify rotor diameter, discard thickness, and the front left position before installation. This rotor is directional, so confirm the rotation orientation during mounting. For listed BMW applications, check whether your vehicle uses the aluminum hat original-design rotor or the optional full cast rotor configuration noted in the fitment data. If your vehicle includes a disc brake pad wear sensor, retain or replace it according to the vehicle’s service requirements.

Quality Assurance

Dynamite Friction supplies this rotor as a corrosion-resistant, application-specific brake component built to the listed dimensions and fitment notes. The 631-31099D rotor is engineered for the BMW front left applications shown above and is intended to meet the service needs of those original configurations.