MMX Performance Billet Air Conditioning Caps

The MMX Performance BMW / MINI Billet Air Conditioning Cap Set is a precision-machined replacement for the factory plastic A/C service port caps used across a wide range of BMW and MINI models. Designed to improve long-term durability while maintaining a refined engine bay appearance, the MMX billet caps replace the original plastic components with CNC-machined 6061-T6 aluminum.

Factory A/C service port caps are exposed to repeated heat cycling, environmental conditions, and routine removal during servicing. Over time, the original plastic caps can become brittle, discolored, or damaged. The MMX billet replacement set provides a more durable solution while retaining the factory service function and installation method.

Each cap is finished in black anodizing and hand-polished to complement other MMX billet engine bay components. A subtle engraved MMX “X” logo adds a clean detail without overpowering the OEM-style appearance.

The caps are designed as direct replacements for compatible factory A/C service port caps and install without modification or system depressurization. Two versions are available to match the common BMW and MINI A/C system types: R134A applications with black OEM caps and R1234YF applications with grey OEM caps.

Please reference the OEM cap photos before ordering and select the version that matches the color and style of your factory BMW / MINI A/C caps. The MMX replacement caps themselves are only offered in Anodized Black.

Product Details

• CNC-machined from 6061-T6 billet aluminum
• Black anodized finish
• Engraved MMX “X” logo
• Direct replacement for compatible factory A/C service port caps
• Pre-sealed for installation
• Improved durability compared with factory plastic caps
• No A/C system depressurization or re-gassing required for installation
• Fully reversible installation
• MMR03-0003: R1234YF application, grey OEM cap reference
• MMR03-0004: R134A application, black OEM cap reference