Why does this BMW billet oil filler cap need a 0° or 90° fitment option?

Across the huge range of B58, N54, N55, S54, S55, and S63 applications this cap covers, the engine is mounted in different orientations depending on the model — some longitudinally, some transversely. The BMW billet oil filler cap can be installed at either 0° or 90° to ensure the cap sits correctly aligned regardless of how the engine is positioned in the bay.

Do I need a new seal to install this BMW billet oil filler cap?

No. The original oil filler cap seal from your factory cap is reused during installation; a new seal is not supplied or required separately.

How do I know if this cap fits my specific BMW?

This BMW billet oil filler cap fits any engine with the rounded filler cap design and matching underside shown in the product images, covering B58, N54, N55, S54, S55, and S63 engines as listed in the Applications section. If your model and engine code appear in that list, the cap is a confirmed fit.

What does the click-lock mechanism do?

The internally sprung, click-lock mechanism gives a positive, audible confirmation that the BMW billet oil filler cap is correctly seated on every installation. This eliminates the under-tightening risk that causes oil seepage on aging OEM plastic caps, where the original spring mechanism has weakened over time.

Does this fit both four-cylinder and V8 BMW engines?

Yes. This BMW billet oil filler cap is engineered to fit the four-cylinder and six-cylinder B58, N54, N55, S54, and S55 engines as well as the V8 twin-turbo S63 used in the M5, M6, M8, and X5 M, X6 M models, since all of these share the same rounded oil filler cap fitment design.

Description

Additional Info

Shipping policy

BP PRICING DIFFERENCE

Reviews

Product Inquiry

Description

MMX Billet Oil Filler Cap for BMW Vehicles with B58, N54, N55, S54, S55, or S63 Engines

BMW billet oil filler cap from MMX Performance is a precision-machined replacement for the OEM plastic oil filler cap, engineered to fit the widest range of BMW engines in the MMX billet cap lineup: B58, N54, N55, S54, S55, and S63, spanning everything from the 335i and M240i through to the V8 twin-turbo M5, M6, and X5 M. Crafted from aerospace-grade 6061 billet aluminum and finished in deep gloss black anodizing, the cap adds a refined, motorsport-inspired touch to the engine bay while replacing a factory part that develops oil seepage as it ages. An updated design allows the cap to be installed in either 0° or 90° orientation, ensuring correct alignment whether the engine is mounted longitudinally or transversely a detail that matters across a fitment range this wide, since not every B58 and N55 application shares the same engine orientation. The internally sprung, click-lock mechanism delivers a secure, leak-free seal on every installation, eliminating the under-tightening risk that causes oil seepage on aging OEM caps, while a generous grip surface makes removal and refitting straightforward during routine oil services. This is a direct OEM replacement with no modifications required; the original oil filler cap seal is reused during installation.

Features

CNC-machined from solid 6061 aerospace-grade aluminum
Gloss black anodized finish
Internally sprung, click-lock mechanism for a secure, leak-free seal
Eliminates the oil seepage common with aging OEM caps
Installs in 0° or 90° orientation for correct alignment on any engine layout
Enhanced grip surface for easy removal and refitting
Direct replacement for the OEM oil filler cap; no modifications required
Complements other MMX engine dress-up components

Applications

BMW 135i: E82, E88 | 2008-2013
BMW 1M Coupe: E82 | 2011
BMW 335i: E90, E91, E92, E93 | 2006-2013
BMW 340i: F30, F31, F34 | 2016-2019
BMW 435i: F32, F33, F36 | 2013-2016
BMW 440i: F32, F33, F36 | 2016-2020
BMW 535i: E60, E61, F10, F11 | 2007-2017
BMW 540i: G30, G31, G60, G61 | 2017-present
BMW 640i: F06, F12, F13, G32 | 2011-2023
BMW 740i: F01, F02, G11, G12, G70 | 2009-present
BMW 840i: G14, G15, G16 | 2019-present
BMW M135i: F20, F21 | 2012-2016
BMW M140i: F20, F21 | 2016-2019
BMW M2: F87 | 2016-2021
BMW M235i: F22, F23 | 2014-2016
BMW M240i: F22, F23, G42 | 2016-present
BMW M3: F80 | 2014-2018
BMW M4: F82, F83 | 2014-2020
BMW M5: F10, F90 | 2011-2016, 2018-2023
BMW M6: F06, F12, F13 | 2012-2018
BMW M8: F91, F92, F93 | 2019-present
BMW X3 M40i: G01 | 2017-present
BMW X3 xDrive35i: F25 | 2010-2017
BMW X4 M40i: G02 | 2018-present
BMW X4 xDrive35i: F26 | 2014-2018
BMW X5 M: E70, F85, F95 | 2010-2013, 2015-2018, 2020-2023
BMW X5 xDrive40i: G05 | 2019-present
BMW X6 M: E71, F86, F96 | 2010-2023
BMW X6 xDrive35i: E71 | 2008-2010
BMW X6 xDrive40i: G06 | 2020-present
BMW X7 xDrive40i: G07 | 2019-present
BMW Z3 M: E36/7, E36/8 | 2001-2002
BMW Z4 M: E85, E86 | 2006-2008
BMW Z4 M40i: G29 | 2019-present
BMW Z4 sDrive35i: E89 | 2009-2016
BMW Z4 sDrive35is: E89 | 2011-2016

Notes

You will need to reuse your original oil filler cap seal
This oil filler cap fits all engines with the rounded filler cap and same underside as shown in product images

Frequently Asked Questions

Why does this BMW billet oil filler cap need a 0° or 90° fitment option? Across the huge range of B58, N54, N55, S54, S55, and S63 applications this cap covers, the engine is mounted in different orientations depending on the model some longitudinally, some transversely. The BMW billet oil filler cap can be installed at either 0° or 90° to ensure the cap sits correctly aligned regardless of how the engine is positioned in the bay.
Do I need a new seal to install this BMW billet oil filler cap? No. The original oil filler cap seal from your factory cap is reused during installation; a new seal is not supplied or required separately.
How do I know if this cap fits my specific BMW? This BMW billet oil filler cap fits any engine with the rounded filler cap design and matching underside shown in the product images, covering B58, N54, N55, S54, S55, and S63 engines as listed in the Applications section. If your model and engine code appear in that list, the cap is a confirmed fit.
What does the click-lock mechanism do? The internally sprung, click-lock mechanism gives a positive, audible confirmation that the BMW billet oil filler cap is correctly seated on every installation. This eliminates the under-tightening risk that causes oil seepage on aging OEM plastic caps, where the original spring mechanism has weakened over time.
Does this fit both four-cylinder and V8 BMW engines? Yes. This BMW billet oil filler cap is engineered to fit the four-cylinder and six-cylinder B58, N54, N55, S54, and S55 engines as well as the V8 twin-turbo S63 used in the M5, M6, M8, and X5 M, X6 M models, since all of these share the same rounded oil filler cap fitment design.

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.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Product Inquiry

First Name (*required)

Last Name (*required)

Your E-Mail (*required)

Telephone Number (*required)

Country (*required)

Vehicle Year / Make / Model (*required)

Please Explain What do you want to do with your vehicle

Additional Information (optional)

I agree to the terms & conditions and privacy policy and to have Bulletproof Automotive LLC contact me for promotion, marketing and other purposes via email, phone or SMS message.

MMX Billet Oil-Filler Cap for BMW Vehicles (with B58, N54, N55, S54, S55, or S63 engine) [MMR03-0102-BL]

Guaranteed Safe Checkout

MMX Billet Oil Filler Cap for BMW Vehicles with B58, N54, N55, S54, S55, or S63 Engines

Features

Applications

Notes

Frequently Asked Questions

About MMX Performance

Reviews