MMX Washer Fluid Filler Cap for G8x BMW

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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.