Give your BMW or MINI engine bay a clean motorsport look with the MMX Billet Aluminium Expansion Tank Cap. Precision CNC-machined in the UK from solid billet aluminium, this 60 mm coolant reservoir cap is a direct replacement for the factory header tank lid and delivers a secure, positive feel every time you tighten it. A simple upgrade that looks premium and stands up to road and track use.
- CNC-machined from solid billet aluminium for strength and durability
- 60 mm diameter direct replacement for the original expansion tank cap
- Replaces OE reference 17 11 7 639 024 on compatible BMW and MINI models
- Secure, precise engagement for a confident seal
- Full replacement cap, not a stick-on dress-up cover
- Motorsport-inspired finish that elevates any engine bay
This billet coolant cap is ideal whether you are refreshing a daily driver or finishing a performance build. Also searched as coolant header tank lid, radiator expansion reservoir cap, BMW MINI expansion tank cover and billet alloy coolant cap.
Compatibility
Fits vehicles that use OEM cap number 17 11 7 639 024. Please check the part number on your existing coolant reservoir cap to confirm fitment before ordering.
Nforcd knows this upgrade well and it has proven popular with our customers for its fit, finish and satisfying operation.
Fitting
Installation is straightforward. Nforcd offers professional fitting in Warwickshire. Request a quote via Sales@nforcd.com.
Add the MMX billet expansion tank cap to your basket today for a tougher, smarter replacement for your BMW or MINI coolant reservoir lid.