MMX Performance Billet Oil Filler Cap – BMW S58 & B48E
OE Replacement: 11 12 8 654 637
Enhance both the appearance and reliability of your BMW engine bay with the MMX Performance Billet Oil Filler Cap, precision-engineered as a true OE replacement for S58 and B48E engines.
Designed and manufactured in the UK, each cap is CNC-machined from a single solid billet of aluminium using advanced 5-axis technology. It’s then polished and finished in a deep gloss black anodised coating, ensuring a premium appearance that lasts year after year.
Unlike cosmetic caps that sit over the factory unit, this is a complete replacement oil cap, supplied pre-assembled with OE-spec internals, including the valve and internal spring. This guarantees correct sealing, positive engagement, and total peace of mind — with no parts transfer required from your original cap.
The ergonomically designed profile provides excellent grip, making oil top-ups quicker and easier, while delivering an instant OEM+ visual upgrade. It also integrates perfectly with the wider MMX engine dress-up range for a fully transformed under-bonnet look.
Key Features:
Direct OE replacement – not a cover
Fits BMW S58 & B48E engines
CNC-machined from solid billet aluminium
Gloss black anodised for long-term durability
Supplied pre-sealed with OE-spec valve & spring
Positive, secure fit every time
Enhanced grip for easy removal and refitting
Plug-and-play installation
Compatibility:
Fits engines using OE oil cap part number: 11 12 8 654 637
Suitable for BMW S58 and B48E engines
**Please check the underside of your factory oil cap to confirm the OE part number before ordering**
