MMR03-1503

MMR Billet coolant expansion cap for MINI

The MMR Performance billet coolant expansion cap for F-Series MINIs has been designed from the ground up in the UK, constructed from a solid billet of aluminium.

All MMR coolant caps arrive pre-sealed and pre-installed with an OE spec valve and internal spring.

Each MMR cap starts life as a solid billet of 6061 aerospace-grade aluminium. It's meticulously machined from this billet in the UK with the latest CNC 5-axis technology, before being polished, then gloss-anodised to stay beautiful year after year.

All MMR coolant caps arrive pre-sealed and pre-installed with an OE spec valve and internal spring. No need to remove the valve assembly from your OE cap. A true plug and play solution.

It has been designed to instantly give your MINI an under-bonnet boost in the aesthetic department, finished in a deep gloss black anodised finish.

Never again will you worry whether you tightened your expansion cap fully, as the cap contains complete OE replacement internals. The carefully considered design gives ample surface grip area for your fingers, making installation and filling your coolant that little bit easier.

MMR Billet coolant expansion cap for MINI
MMR Billet coolant expansion cap for MINI
MMR Billet coolant expansion cap for MINI
MMR Billet coolant expansion cap for MINI
MMR Billet coolant expansion cap for MINI
MMR Billet coolant expansion cap for MINI
SKU: MMR03-1503

MMR Billet coolant expansion cap for MINI

Sale price£81.89

Tax excluded. Shipping calculated at checkout

The MMR Performance billet coolant expansion cap for F-Series MINIs has been designed from the ground up in the UK, engineered from a solid billet of aluminium.

The cap is designed to directly replace the OE cap, not merely a cover stuck in place. Fitment is for models with the matching OE (17 11 7 639 024) part number.

In stock
Find a dealer

Product fitment.

While every effort has been made to ensure the accuracy of this information, we are not liable for abnormalities or inaccurate data. Customers are wholly responsible for checking fitment for their vehicle.

Model variant

Our cap will fit all MINI B38, B48, B37 & B47 engines (OE Part Number 11128655331). This cap does not fit the newer B48E engines, we offer another cap for those vehicles here.

Pre-sealed and pre-installed with an OE spec valve and internal spring

It joins our existing range of engine dress-up products

Where to purchase

Over 100 dealers, globally.

Our network of expert MMX Performance dealers can supply our full range, together with product guidance and advice, plus often an experience fitting service.

If you haven't got a MMX Performance dealer close to you, don't worry! Remember you can buy direct from our MMX Performance webshop.

Find a dealer

About MMX

A decade worth of obsession.

MMX Performance products have been designed and developed in the UK with passion by enthusiasts, for enthusiasts. All of our products are created in the world's toughest development lab: motorsport. We push the limits and reach new heights on track; then refine our products to give you the performance you need when you want it on the road.

Our extensive range of BMW and MINI upgrades offer unrivalled quality, performance and reliability worldwide; furthermore, every product carrying the MMX logo is thoroughly durability tested both on the road and track, so you can have complete peace of mind that you're installing only the best quality products to unlock the true performance potential from your car.