Description
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.
Provides a beautiful complete replacement for your factory plastic cap to really smarten up the under bonnet visuals.
The MMX Performance billet washer bottle cap for BMW G8x models is a UK-engineered upgrade, crafted from a solid block of aluminium.Purpose-built to replace the factory plastic cap, it delivers a refined feel and a premium under-bonnet finish that far surpasses the OE part.Each washer fluid cap is precision-sealed to ensure a perfect, leak-free fit. Unlike simple stick-on covers, this is a full replacement designed to integrate seamlessly. Using the latest CNC 5-axis machining, every cap is meticulously shaped, then hand-polished and gloss-anodised for durability and lasting beauty.
Product features
- 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.
- Please note if the part is under excessive heat for prolonged periods of time, it can affect the overall finish, which is unavoidable with anodised aluminium products.
Confirmed Applications
| Make | BMW |
| Model | All |
| Series | All G8x BMWs |
| Engine | All |













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