MMX Performance BMW Billet Oil Filler Cap

$127.70
$127.70
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The MMX Performance BMW Billet Oil Filler Cap replaces the factory plastic oil filler cap with a precision-machined aluminum upgrade designed to improve durability, operation, and engine bay appearance. Designed as a direct replacement for BMW OE part number 11128655331, the MMX cap is compatible with a broad range of BMW applications utilizing the corresponding rounded factory oil filler cap design.

Each MMX oil filler cap begins as a solid billet of 6061 aerospace-grade aluminum before being CNC-machined using advanced 5-axis manufacturing. The finished cap is polished and treated with a deep gloss black anodized finish, providing a clean appearance while improving resistance to corrosion and wear compared to the factory plastic component.

Function was considered throughout the design. An internally sprung locking mechanism provides positive engagement when the cap is secured, while the machined outer profile provides additional grip during installation and removal. The cap can also be installed in either a 0-degree or 90-degree orientation, allowing the MMX logo to be correctly positioned across different engine layouts.

The billet construction also provides a long-term replacement for aging factory oil filler caps that can develop sealing issues and oil seepage over time. Installation requires transferring the original factory oil filler cap seal to the MMX cap, retaining the corresponding OE sealing interface.

Product Details

  • MMX Performance billet oil filler cap for BMW
  • Direct replacement for BMW OE part number 11128655331
  • CNC-machined from solid 6061 aerospace-grade aluminum
  • Advanced 5-axis machining for precise fitment
  • Deep gloss black anodized finish
  • Internally sprung locking mechanism provides positive engagement
  • 0-degree or 90-degree installation orientation for proper logo alignment
  • Machined outer profile provides improved grip during installation and removal
  • Replaces the factory plastic oil filler cap
  • Original factory oil filler cap seal is reused
MMX Performance BMW Billet Oil Filler Cap

$127.70

Does it come with a warranty?

Parts are covered by the manufacturer's warranty where one is offered. If something goes wrong, contact us and we'll help you with the claim.

What happens if I don't like it?

New, uninstalled parts in their original packaging can be returned within 30 days of delivery. Suspension components (coilovers, springs and dampers), wheel spacers and batteries can't be returned, and a restocking fee applies to approved returns. See our refund policy for details.

How fast is shipping?

In-stock orders usually ship within 1–3 business days. Many parts ship directly from the manufacturer or distributor. Orders over $200 ship free with standard shipping, and faster UPS and USPS options are available at checkout. See our shipping policy.

What's the returns policy?

You have 30 days after receiving your item to request a return. Parts must be new, uninstalled and in their original packaging. Contact us first to start a return. Full details are in our refund policy.

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