MMR Performance Billet 6061 Aluminium Oil Filler/Engine Oil Cap for BMW B58 N54 N55 S54 S55 S63 – CNC Black Anodised Click-Lock, Rocker/Cam Cover Oil Lid – OEM Replacement Round Type – Fits OE 11128655331 – M2 M3 M4 M5

MMR Performance Aluminium Engine Oil Cap Upgrade for BMW B58, N54, N55, S54, S55, S63

Give your BMW a premium under-bonnet finish and a rock-solid seal with MMR’s machined aluminium oil cap. Crafted from solid 6061 alloy and finished in deep black anodising, this metal oil lid delivers a positive click when locked so oil top-ups are quick, clean and secure. It is a direct swap for the factory plastic cap that often weeps as it ages.

Key benefits

• Solid 6061 aluminium body for superb durability and heat resistance
• Gloss black anodised finish for a high-end engine bay look
• Positive locking click so you know it is fully closed every time
• Two index positions allow perfect logo alignment on longitudinal or transverse layouts
• Large easy-grip profile for effortless removal and refit even with oily or gloved hands
• Helps address light oil misting seen with ageing factory caps
• Complements other MMR engine bay styling parts for a cohesive appearance

Premium construction

Each cap starts as a solid billet and is precision machined on multi-axis CNC equipment before being polished and anodised. The tight tolerances and spring-assisted locking action give a reassuring, repeatable fit that stands up to daily use and spirited driving.

Fitment and compatibility

Designed for BMW engines that use the round-style factory cap. Cross-reference the underside of your original part with the OE number below to confirm.

• Compatible engines: B58, N54, N55, S54, S55, S63
• Part reference for underside match: OE 11128655331

Please compare the underside of your original cap to the product images to verify the same interface.

Tried and loved by us and our customers

We run this cap on our own BMW builds and it has been brilliant. The fit is precise, the locking click is satisfying and the black finish elevates the whole bay. Feedback from our customers mirrors our experience with praise for the quality, look and leak-free performance.

Install and fitting support

Quick DIY fit. Simply twist off the original cap and twist on the new cap. Reuse your existing rubber seal for correct sealing.

Prefer professional installation. Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Good to know

• Reuse your original gasket to ensure a proper seal
• Extended exposure to extreme heat may gradually affect anodised finishes

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