{"product_id":"mmx-bmw-billet-oil-filler-cap-b48-b58-n55-s54-s55-s63","title":"MMX BMW Billet Oil Filler Cap For B48, B58, N55, S54, S55 \u0026 S63 Engines","description":"\u003cp\u003eThe \u003cstrong\u003eMMX BMW Billet Oil Filler Cap\u003c\/strong\u003e replaces the factory plastic cap with a CNC-machined billet aluminium item finished in deep gloss black anodising. It covers the widest-used BMW cap thread, fitting B48, B58, N55, S54, S55 and S63 engines that carry \u003cstrong\u003eOE part number 11 12 8 655 331\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFitment Is Decided By The Part Number\u003c\/h3\u003e\n\u003cp\u003eBMW does not use a single oil cap across its range, so model alone is not enough to determine fitment. The reliable check takes ten seconds: remove the existing cap and read the number moulded into the underside. If it reads 11 12 8 655 331, this is the correct cap. Later B48E and S58 engines use a different thread and are covered by a separate MMX cap.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eMachined, Not Covered\u003c\/h3\u003e\n\u003cp\u003eThe MMX cap is a full replacement, threading onto the cam cover in place of the original with its own seal. Adhesive covers, by contrast, sit on top of the plastic cap they are hiding and are prone to lifting under heat or catching as the cap is removed. A machined cap also gives a far better grip for an oil top-up on a hot engine.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined from solid billet aluminium\u003c\/li\u003e\n\u003cli\u003eDeep gloss black anodised finish\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OE part number 11 12 8 655 331\u003c\/li\u003e\n\u003cli\u003eFits B48, B58, N55, S54, S55 and S63 engines\u003c\/li\u003e\n\u003cli\u003eKnurled profile for a secure grip when hot\u003c\/li\u003e\n\u003cli\u003eFully reversible – the OEM cap can be refitted 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 Number:\u003c\/strong\u003e MMR03-0102-BL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces OE:\u003c\/strong\u003e 11 12 8 655 331\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Billet aluminium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Gloss black anodised\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBMW B58 – M140i, M240i, 340i, 440i, M340i, M440i and more\u003c\/li\u003e\n\u003cli\u003eBMW N55 – F87 M2, M135i, M235i, 335i, 435i\u003c\/li\u003e\n\u003cli\u003eBMW S55 – F80 M3, F82\/F83 M4, F87 M2 Competition\u003c\/li\u003e\n\u003cli\u003eBMW S63 – F10 M5, F13 M6 and X5M\/X6M applications\u003c\/li\u003e\n\u003cli\u003eBMW S54 and B48 engines using OE cap 11 12 8 655 331\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit an S58 engine?\u003c\/strong\u003e\u003cbr\u003eNo. S58 and B48E engines use OE cap 11 12 8 654 637, for which MMX offers a separate billet cap.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the cap seal as well as the original?\u003c\/strong\u003e\u003cbr\u003eYes. It carries its own seal and threads onto the cam cover exactly as the factory cap does.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Choose An MMX Billet Cap?\u003c\/h3\u003e\n\u003cp\u003eThis is the single cheapest way to change how a BMW engine bay looks, and because MMX replaces rather than covers the factory part, it holds up to years of oil services rather than months. R44 Performance stocks the full MMX under-bonnet dress-up range.\u003c\/p\u003e","brand":"MMX","offers":[{"title":"Default Title","offer_id":57929971597694,"sku":"MMR03-0102-BL","price":98.27,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0280\/7568\/8011\/files\/MMR03-01025.png?v=1787916849","url":"https:\/\/r44performance.com\/products\/mmx-bmw-billet-oil-filler-cap-b48-b58-n55-s54-s55-s63","provider":"R44 Performance","version":"1.0","type":"link"}