MMX Washer Fluid Filler Cap for G8x BMW It’s all about that detail. Replace that cheap plastic washer cap with the stunning MMX billet washer fluid cap finished in anodised gloss black. The perfect addition to an already comprehensive range of under-bonnet dress up parts. 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. 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. Vehicle fitment Model variant All G8x BM Ws