MMX BMW M2/M3/M4 (G8X) High-Capacity Baffled Differential Sump
If you track your G8x M2, M3, or M4, the MMX High-Capacity Baffled Differential Sump is a crucial upgrade. Designed to maintain peak performance under extreme conditions, this sump ensures your vehicle’s drivetrain operates flawlessly lap after lap.
Key Benefits
- Increased Oil Capacity: Adds up to 2 litres (2.10 quarts) of oil, providing optimal lubrication for your differential.
- Internal Windage Tray: Keeps gears and the pinion lubricated while reducing drag.
- Improved Efficiency: Minimises drivetrain losses, helping to maintain power delivery and prolong component life.
- Cooling Fins: Features both internal and external fins to help manage temperatures and prevent overheating.
- Precision Construction: Made from 6061-T6 billet aluminium for strength and lightweight performance.
Seamless Fitment
This differential sump fits precisely like the original equipment (OE) components, allowing for a straightforward installation without modifications. It is compatible with both RWD and xDrive configurations of the G8x M2, M3, and M4 models.
Additional Features
- Enhanced Cooling Capability: Includes an extra -8AN port with an M22 to -8AN fitting adaptor for external cooler setups.
- Dual Differential Mount Compatibility: Designed to work perfectly with the optional Dual Differential Mount (MMR55-1606), providing flexible setup options.
What’s in the Box
- Billet CNC-Machined Baffled Sump
- Billet CNC-Machined Windage Tray
- Magnetic Drain Plug + Seal
- Fill Plug + Seal
- M22 to -8AN adaptor for external oil cooler
- Necessary hardware for installation
This upgrade not only enhances reliability but also helps prevent issues like the “Rear Axle Differential Lock: Driving Stability Limited” warning, allowing for more uninterrupted track time.
To confirm fitment for your specific vehicle, please use our vehicle lookup functionality or check the “Vehicle Fitment” tab for full details.














