Does this BMW billet fuel cap fit every BMW model?

Yes. The BMW billet fuel cap is engineered to fit the factory fuel cap fitting used across virtually every BMW model from 1997 to present, since BMW has used the same general fuel cap design and filler flap holder across the vast majority of its model range over that period.

Does the pressure relief valve still work like the OEM cap?

Yes. The MMX BMW billet fuel cap retains a fully functional integrated pressure-relief valve, the same safety feature present in the factory plastic cap. This is not a cosmetic-only replacement; all OEM functionality is preserved.

Why does the fuel cap have a tether?

The OEM-style tether keeps the BMW billet fuel cap attached to the vehicle when removed during refueling, preventing it from being set down and forgotten or dropped. This matches the factory cap's behavior so the refueling routine feels identical to stock.

Does this also fit the Toyota GR Supra?

Yes. The A90/A91 GR Supra shares the same fuel cap fitting as BMW models due to the Supra's BMW-co-developed platform, so the BMW billet fuel cap is a direct fitment for the GR Supra as well.

Does the cap still click closed and seat in the filler flap holder like the factory cap?

Yes. The BMW billet fuel cap delivers the same satisfying, engineered click on closure as the OEM unit and seats cleanly into the factory filler flap holder, so the entire refueling routine matches the stock experience with the added visual upgrade.

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BP PRICING DIFFERENCE

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Description

MMX Billet Fuel Cap for BMW, MINI, and A9x Toyota GR Supra

BMW billet fuel cap from MMX Performance is a precision-machined upgrade for the factory plastic fuel cap, fitting virtually every BMW from 1997 to present, every MINI from 2007 to present, and the A90/A91 Toyota GR Supra. CNC-machined from solid 6061 aerospace-grade aluminum and hand-polished to a sleek gloss Midnight Black anodized finish with a laser-etched MMX logo, the BMW billet fuel cap brings a refined, motorsport-inspired detail to a part most owners interact with at every single refuel. Designed as a direct replacement for the factory plastic cap, it retains full OEM functionality: a working pressure-relief valve, a rubber O-ring seal, and a tether for secure fitment so the cap can never be misplaced during refueling. The cap delivers a satisfying, engineered click on closure and seats cleanly into the factory filler flap holder, matching the OEM refueling routine exactly while replacing the one component most likely to look tired and plastic-cheap on an otherwise well-presented car.

Features

Precision CNC-machined from solid 6061 aerospace-grade aluminum
Gloss Midnight Black anodized finish
Laser-etched MMX logo
Includes new rubber O-ring seal and OEM-style tether
Integrated pressure relief valve
Retains factory filler flap holder functionality
Satisfying click closure for a premium refueling experience
Durable, corrosion-resistant, and visually refined upgrade

Applications

All BMW: 1997-present
All MINI: 2007-present
Toyota GR Supra: A90, A91 | 2020-present

Frequently Asked Questions

Does this BMW billet fuel cap fit every BMW model? Yes. The BMW billet fuel cap is engineered to fit the factory fuel cap fitting used across virtually every BMW model from 1997 to present, since BMW has used the same general fuel cap design and filler flap holder across the vast majority of its model range over that period.
Does the pressure relief valve still work like the OEM cap? Yes. The MMX BMW billet fuel cap retains a fully functional integrated pressure-relief valve, the same safety feature present in the factory plastic cap. This is not a cosmetic-only replacement; all OEM functionality is preserved.
Why does the fuel cap have a tether? The OEM-style tether keeps the BMW billet fuel cap attached to the vehicle when removed during refueling, preventing it from being set down and forgotten or dropped. This matches the factory cap’s behavior so the refueling routine feels identical to stock.
Does this also fit the Toyota GR Supra? Yes. The A90/A91 GR Supra shares the same fuel cap fitting as BMW models due to the Supra’s BMW-co-developed platform, so the BMW billet fuel cap is a direct fitment for the GR Supra as well.
Does the cap still click closed and seat in the filler flap holder like the factory cap? Yes. The BMW billet fuel cap delivers the same satisfying, engineered click on closure as the OEM unit and seats cleanly into the factory filler flap holder, so the entire refueling routine matches the stock experience with the added visual upgrade.

About MMX Performance

MMX Performance is a UK-based specialist in performance parts for BMW and MINI vehicles, crafting high-quality upgrades that blend precision engineering, rigorous testing, and motorsport heritage. Driven by enthusiast culture, MMX designs its products in the UK and puts them through track validation to ensure durability, fitment accuracy, and on-road performance. Their catalog spans drivetrain components, spacers, hardware, and chassis enhancements, all tailored to elevate both the driving experience and visual appeal of BMW and MINI models.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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MMX Billet Fuel Cap for BMW Vehicles / MINI Vehicles / A9x Toyota GR Supra [MMR03-1501]

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MMX Billet Fuel Cap for BMW, MINI, and A9x Toyota GR Supra

Features

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Frequently Asked Questions

About MMX Performance

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