{"product_id":"mmx-bmw-mini-billet-air-conditioning-cap-set","title":"MMX BMW \u0026 MINI Billet Air Conditioning Cap Set For R134A \u0026 R1234YF Systems","description":"\u003cp\u003eThe \u003cstrong\u003eMMX Billet Air Conditioning Cap Set\u003c\/strong\u003e replaces the brittle plastic service port caps found across the BMW and MINI range with machined 6061-T6 aluminium items. They are anodised black, hand-polished, and carry the subtle MMX ‘X’ logo. Pre-sealed and supplied as a set, they fit in seconds and can be returned to stock just as quickly.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eChoosing The Right Gas Type\u003c\/h3\u003e\n\u003cp\u003eBMW and MINI use two refrigerant systems with different port caps, and the correct set is identified by the colour of the factory caps. \u003cstrong\u003eBlack caps\u003c\/strong\u003e indicate an R134A system, OE part numbers 64 53 8 397 437 and 64 53 8 387 438. \u003cstrong\u003eGrey caps\u003c\/strong\u003e indicate the newer R1234YF gas, OE part numbers 07 14 9 287 978 and 07 14 9 287 979. Selecting by the colour already on the car is the simplest method.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSmall Part, Common Failure\u003c\/h3\u003e\n\u003cp\u003eThe factory caps are thin plastic in a hot, vibrating environment, and they crack, seize or go missing over time. That matters, because the cap is the secondary seal on the service port. Machined aluminium replacements with proper seals remove a nuisance failure and tidy an area of the engine bay that is always on show when the bonnet is up.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMachined from high-quality 6061-T6 aluminium\u003c\/li\u003e\n\u003cli\u003eAnodised black and hand-polished with the MMX ‘X’ logo\u003c\/li\u003e\n\u003cli\u003ePre-sealed and ready to fit\u003c\/li\u003e\n\u003cli\u003eAvailable for R134A (black OEM cap) and R1234YF (grey OEM cap) systems\u003c\/li\u003e\n\u003cli\u003eDirect OEM replacement – installs in seconds with no tools\u003c\/li\u003e\n\u003cli\u003eFully reversible at any time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e MMR03-0003 (Grey \/ R1234YF), MMR03-0004 (Black \/ R134A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 6061-T6 aluminium, anodised\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold As:\u003c\/strong\u003e Set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eR134A systems – black OEM caps, OE 64 53 8 397 437 and 64 53 8 387 438\u003c\/li\u003e\n\u003cli\u003eR1234YF systems – grey OEM caps, OE 07 14 9 287 978 and 07 14 9 287 979\u003c\/li\u003e\n\u003cli\u003eFits the vast majority of BMW and MINI models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhich gas type does the vehicle use?\u003c\/strong\u003e\u003cbr\u003eThe colour of the existing caps is the quickest guide: black indicates R134A, grey indicates R1234YF. The refrigerant type is also usually printed on the under-bonnet service label.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the caps affect the air conditioning system?\u003c\/strong\u003e\u003cbr\u003eThey are the secondary seal on the service ports and do not change how the system operates. Fitting them requires no discharge or re-gas.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eThe Details That Finish An Engine Bay\u003c\/h3\u003e\n\u003cp\u003eOnce the larger dress-up parts are on a car, the remaining plastic caps are what give it away. MMX machines these to the same standard as the rest of its range, and R44 Performance supplies them alongside the full under-bonnet collection.\u003c\/p\u003e","brand":"MMX","offers":[{"title":"Grey","offer_id":57930005315966,"sku":"MMR03-0003","price":29.99,"currency_code":"GBP","in_stock":true},{"title":"Black","offer_id":57930005348734,"sku":"MMR03-0004","price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0280\/7568\/8011\/files\/MMR03-0003MMR03-00041.png?v=1787916853","url":"https:\/\/r44performance.com\/products\/mmx-bmw-mini-billet-air-conditioning-cap-set","provider":"R44 Performance","version":"1.0","type":"link"}