MMX Performance Billet Air Conditioning Caps
MMX Performance Billet Air Conditioning Caps - R1234YF – Grey OEM Cap | MMR03-0003 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Once an order is received for an item and funds have cleared, you can expect your item to ship from our warehouse within 1-2 business days for most of the items we sell. Items will be packaged safely and correctly to prevent any type of damage that can occur during the shipping process. Once your item has been shipped you will receive a confirmation notification of your incoming package including all tracking information. Our packages will be shipped via USPS or UPS Ground or FedEx. For larger items we require them be shipped via UPS Ground or FedEx.
*** Due to the nature of some of the items we sell, some items will take longer to fulfill and deliver. No need to worry, we will let you know if your particular item will take a little more time. This includes orders such as (WHEELS, BODY KITS, and SPECIAL ORDERS, ETC.) which usually take longer than 3-5 days to fulfill. We know how frustrating it is to sit and wait for items, so will be giving you detailed updates along the way until your order has left our warehouse.
***ALL ITEMS WILL BE CHECKED FOR FLAWS AND OR MANUFACTURER DEFECTS BEFORE PACKAGING TAKES PLACE FOR QUALITY CONTROL OF THE ITEMS WE SELL.***
Description
Description
MMX Performance Billet Air Conditioning Caps
Part # MMR03-0003
The MMX Billet Air Conditioning Caps are designed to replace the factory-fitted plastic AC caps found on BMW and MINI models, offering a durable, refined alternative to a commonly overlooked weak point in the engine bay.
Over time, OEM plastic AC caps can become brittle due to heat cycles, age, and repeated removal. This can lead to cracking, poor sealing, and an untidy appearance. MMX billet caps eliminate these issues with a long-lasting aluminum solution that improves both function and aesthetics.
Each cap is CNC-machined from high-quality 6061-T6 aluminum, finished in anodized black, and hand-polished to match the MMX billet aluminum engine bay range. A subtle engraved MMX “X” logo provides a clean OEM+ detail.
MMX offers direct replacements for both OEM AC cap types, ensuring compatibility across BMW and MINI platforms, including older R134A systems using black OEM caps and newer R1234YF systems using grey OEM caps (circa 2017+).
Designed as true OEM replacements, the caps are pre-sealed and install in seconds with no modification required. They are fully reversible and can be removed or returned to stock just as easily. No AC system re-gas is required at any stage, simply remove the factory caps and install the MMX billet versions.
Product Features
CNC-machined from 6061-T6 aluminum
Anodized black finish with engraved MMX “X” logo
Direct OEM replacement design
Pre-sealed for easy installation
Fully reversible, returns to stock in seconds
Designed to match the MMX billet aluminum engine bay range
No AC system re-gas required
Compatibility
R134A Systems (Black OEM Caps)
OEM part numbers: 64 53 8 397 437 and 64 53 8 387 438
R1234YF Systems (Grey OEM Caps)
OEM part numbers: 07 14 9 287 978 and 07 14 9 287 979
Fitment Disclaimer
While every effort has been made to ensure accurate vehicle information, customers are responsible for verifying compatibility with their specific vehicle and engine variant prior to purchase.
Return Policy
Return Policy
RETURNS
- Returns are accepted within 30 days after confirmed delivery of the item.
- There will be a 20% restocking fee assessed for all items returned. Restocking fee may be waived depending on a case by case situation. If there are any more questions or concerns, please contact us immediately for more info on restocking fees.
- If you would like to return an item please contact us as soon as possible, and after approval of a return we will give you instructions on how to complete the return.
- ***ALL RETURNED ITEMS MUST BE IN BRAND NEW CONDITION.
- The buyer is responsible for all return shipping fees unless previously discussed with our sales team.
- After the returned item has been received we will check the item to verify and once approved you can expect your refund within 3-5 business days or sooner.
- ALL RETURNS ARE ONLY ACCEPTED IF ITEMS HAVE NOT BEEN INSTALLED ON THE VEHICLE, ALTERED, TAMPERED AND OR DAMAGED BY INSTALLING PARTY. *** PLEASE CHECK ITEMS THOROUGHLY BEFORE INSTALL!
- Special ordered items that have been shipped are NOT ELIGIBLE FOR RETURN! Please contact us before purchasing for more information.
ORDER CANCELLATIONS
- You may cancel your order before it has been processed and shipped out and receive a full refund.
- If you would like to cancel an order after the item(s) have been shipped out your item is subject to the 20% restocking fee.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.




