Dynamite Friction 633-31017L Disc Brake Rotor - Front Left

Drilled and Slotted Front Left Rotor for BMW

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black, part number 633-31017L, is a vented front left disc brake rotor built for select BMW applications. It features a slotted X drilled surface, a zinc black hat finish, and a rust resistant coating for a clean, service-ready appearance.

Compatible With 1984-1991 BMW 325e, 325es, 325i, 325is, 325iX, 318i, and 318is front left brake applications, this rotor is sized with a 260 mm outside diameter, 22 mm nominal thickness, and 20.4 mm discard thickness. The directional braking surface and vented construction support consistent brake contact and heat management in the specified fitments.

Key Features

• Part number 633-31017L for select BMW front left brake applications
• Slotted X drilled braking surface for improved pad bite and surface cleaning
• Vented rotor design for front axle use
• Zinc black hat finish with rust resistant coating
• 260 mm outside diameter, 22 mm nominal thickness, 20.4 mm discard thickness
• 4-bolt, 4-lug pattern with 100 mm bolt circle diameter
• Directional brake surface for the listed applications

Product Details

The DFC Brake Rotor - Drilled and Slotted - Black line from Dynamite Friction focuses on application-specific brake rotor construction with a black-coated hat and a plain disc finish. This rotor uses a 66 mm center hole diameter, 15 mm bolt hole diameter, and 35.2 mm overall height, making it a direct-fit option for the listed BMW 3 Series and 325iX front left positions. If you are searching for a BMW 325i front left drilled and slotted brake rotor or a BMW 318i front left vented rotor, part number 633-31017L matches the confirmed fitment data provided.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Brake Issues It Can Address

• Worn front left rotor surface on listed BMW models
• Brake pulsation caused by rotor wear or uneven contact
• Reduced pad engagement from a damaged braking surface
• Corrosion on the rotor hat area
• Heat buildup concerns in front brake service on the specified vehicles

Installation Notes and Tips

Verify caliper type before ordering, since some fitments list ATE calipers and others list Girling calipers. Confirm the vehicle production date for 1991 BMW 318i and 318is models, which are listed only through 4/91. Check rotor thickness, bolt circle diameter, and center hole diameter against the existing brake setup before installation.

Quality Assurance

Dynamite Friction supplies this rotor with a rust resistant coating and zinc black hat finish to support long-term appearance and serviceability in the listed applications. Part number 633-31017L is built to the published dimensions and fitment data for the specified BMW front left brake positions.