MMX BMW | MINI Coolant Cap 90MM
MMX BMW | MINI Coolant Cap 90MM
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Description
MMX BMW | MINI Coolant Cap – 90MM
Upgrade your engine bay with the MMX BMW | MINI Coolant Cap (90MM) — a precision-engineered replacement designed to combine OEM reliability with premium aesthetics.
Each MMX coolant cap starts life as a solid billet of 6061 aerospace-grade aluminium, meticulously CNC-machined using advanced 5-axis technology. After machining, the cap is polished and finished in a deep gloss black anodised coating to ensure long-lasting durability and a refined under-bonnet appearance.
Designed as a true plug-and-play upgrade, every cap arrives pre-sealed and pre-installed with an OE-spec valve and internal spring. There is no need to transfer components from your original cap, making installation quick, clean, and secure.
The carefully considered grip design provides excellent finger purchase, removing any doubt about whether the cap has been tightened correctly while also making coolant refills easier.
Key Features
- CNC-machined from 6061 aerospace-grade aluminium
- High-quality gloss black anodised finish
- Pre-installed OE-spec valve and internal spring
- Direct OEM replacement – no modifications required
- Improved grip design for easy installation and removal
- Enhances under-bonnet appearance instantly
Vehicle Fitment
Compatible with BMW and MINI vehicles using the OE coolant cap part number:
OE Part Number: 17 11 7 639 021
While every effort has been made to ensure the accuracy of vehicle information, customers are solely responsible for confirming fitment for their specific vehicle, engine, and model variant prior to purchase.



