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MMX Washer Fluid Filler Cap | G Series | MMX LOGO

Upgrade your engine bay with the MMX billet washer fluid cap. Precision CNC-machined from solid aluminium and finished in anodised gloss black for lasting durability. Designed as a direct replacement for the factory plastic cap, it delivers a refined look and premium feel. The perfect finishing touch to our comprehensive under-bonnet dress-up range.

* Designed and engineered in the UK
* Crafted from 6061-T6 aerospace-grade aluminium
* Full OE cap replacement, not just a cover
* Anodised in MMX signature gloss black
* Joins existing range of MMX billet caps
* Pre-sealed for a precise and leak-free connection

BMW M3 G80
Partnumber: MMR03-0002
72.59 € 72.59 € (Tax included)

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Brand: MMX

MMX Performance


British Engineering, BMW and MINI Specialists

MMX Performance is a UK-based manufacturer dedicated exclusively to performance modifications for BMW and MINI platforms. Formerly known as MMR Performance, the brand has evolved with a sharpened focus on precision engineering, developing a range of upgrades that enhance power, handling, and aesthetics across the full BMW and MINI model range. Every product is designed, tested, and manufactured entirely in-house in the UK, giving MMX complete control over quality, tolerances, and lead times at every stage of the process.

From Concept to Production, All Under One Roof

What sets MMX apart is the depth of their in-house capability. Using advanced 3D scanning and CAD software, the team designs every component from scratch before bringing prototypes to life with state-of-the-art 3D printing, all without outsourcing a single step. This fully integrated process allows for rapid iteration, exceptional precision, and a level of quality control that off-the-shelf or outsourced manufacturing simply cannot match. No shortcuts, no compromise, just thorough British engineering applied to every part before it reaches the customer.

Pushed to the Limit Before It Reaches Yours

Every MMX product is subjected to rigorous in-house testing before it enters production. This commitment to validation, not just design, ensures that what arrives fits perfectly, performs as intended, and holds up under real-world and performance driving conditions. For BMW and MINI owners who want modifications developed with genuine engineering depth rather than generic fitments, MMX Performance represents a specialist choice backed by a clear and uncompromising development process.