Dynamic Friction 820-31182D Disc Brake Rotor - Rear Left

BMW rear left brake rotor

This Dynamic Friction DFC Geoperformance Rotor - Drilled disc brake rotor is built for BMW applications that require a rear left replacement with a directional, vented design. Part number 820-31182D is listed across multiple BMW 7 Series, 8 Series, X5, X6, and X7 applications.

Key features

• Drilled surface helps support heat management and consistent braking feel.
• Vented rotor construction promotes airflow through the braking surface.
• Plain disc finish keeps the rotor focused on function.
• Directional brake surface is matched to the specified application.
• Fits BMW rear left applications with the listed 370 mm outside diameter and 22.4 mm discard thickness.

Detailed description

The 820-31182D is a DFC Geoperformance drilled brake rotor engineered for BMW rear left fitments. It uses a vented, directional design with a 370 mm outside diameter and 22.4 mm discard thickness, making it a direct service part for the listed BMW 840i, 840i Gran Coupe, 840i xDrive, 840i xDrive Gran Coupe, X5, X6, X7, 540i, 540i xDrive, M550i xDrive, 740i, 740i xDrive, 745e xDrive, 750i xDrive, and 750Li xDrive applications. This part number 820-31182D is also identified as a full cast replacement for aluminum hat disc applications where noted.

What it is used for

• Replacing a worn rear left brake rotor on supported BMW models.
• Restoring braking surface condition when the rotor is scored or uneven.
• Addressing brake pulsation caused by rotor wear or thickness variation.
• Supporting heat dissipation in vented rear brake setups.
• Maintaining correct fitment on applications that specify a directional rotor.

Installation notes and tips

Confirm the vehicle’s rear left brake configuration before ordering, especially on BMW models with full cast replacement notes for aluminum hat disc setups. Match the rotor to the listed application details, including outside diameter, discard thickness, and directional surface design. Because fitment varies by model and year, verify the exact BMW 840i, X5, X6, X7, 540i, 740i, or 750i xDrive application against the vehicle build data before installation.

Quality assurance

Dynamic Friction supplies this rotor as part of its DFC Geoperformance Rotor - Drilled line, with application-specific engineering for the listed BMW fitments. Part number 820-31182D is built to the stated dimensional and design requirements for the covered vehicles.