Description
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.






