MMX Performance BMW Billet Oil Filler Cap

The MMX Performance BMW Billet Oil Filler Cap is a precision-engineered upgrade designed to enhance both the durability and visual appeal of your BMW engine bay. Replacing the factory plastic oil cap, this billet solution delivers improved reliability, a more secure fit, and a refined OEM+ finish that complements both stock and modified vehicles.

Machined from a solid block of 6061 aerospace-grade aluminum using advanced 5-axis CNC technology, the MMX oil filler cap offers exceptional strength, heat resistance, and long-term durability. The cap is finished in a deep gloss black anodized coating for corrosion resistance and a clean, premium appearance that will maintain its finish over time.

Engineered with both functionality and usability in mind, the cap features an internal spring-loaded locking mechanism that provides a positive, secure engagement when installed. This ensures consistent sealing performance and helps prevent common issues such as oil seepage or improper seating associated with aging factory caps.

The MMX billet oil filler cap also features a dual-orientation design, allowing installation in either a 0° or 90° position. This ensures proper logo alignment across different engine layouts while maintaining OEM-level fitment and ease of use. The machined exterior profile provides improved grip, making installation and removal during routine service simple and precise.

A direct replacement for BMW engines utilizing the rounded factory cap design, this billet oil filler cap offers a functional upgrade with long-term reliability and a premium finishing touch for any engine bay.

Product Details

• MMX Performance billet oil filler cap for BMW
• CNC-machined from 6061 aerospace-grade aluminum
• Advanced 5-axis machining for precise fitment
• Gloss black anodized finish for durability and OEM+ appearance
• Spring-loaded locking mechanism for secure installation
• Dual orientation design (0° or 90°) for proper logo alignment
• Improved grip for easier installation and removal
• Helps prevent oil seepage from worn factory caps
• Direct replacement for compatible BMW engines

Vehicle Applications

• BMW engines utilizing rounded oil filler cap design (OE part number 11128655331)
• Common applications include B58, N54, N55, S54, S55, and S63 engines

Recommended Products

• MMX Performance BMW Oil Thermostat Housing Cover Kit

Notes

• SKU: MMR03-0102-BL
• Direct replacement for OE part number 11128655331
• Original factory oil filler cap seal must be reused
• Verify compatibility by comparing underside of factory cap prior to installation
• Designed and engineered in the UK
• Professional installation not required