{"product_id":"genuine-bmw-b58-tu-high-power-stage-1-2-spark-plug-inc-m240i-m340i-x5-40i","title":"Genuine BMW B58 TU\/B58TU High Power Spark Plug Stage 1\/2, OEM 12122455258  Fits M140i M240i M340i 340i 440i 540i 740i X5 40i X7 40i Z4 M40i Toyota Supra A90","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003cdiv\u003e\n    \n    \u003ch2\u003eBMW OE B58TU High Power Ignition Plug - Part No. 12122455258\u003c\/h2\u003e\n    \n    \u003cp\u003e\n      Looking for a reliable ignition upgrade for your turbocharged six-cylinder B58 engine? This BMW original equipment B58TU high power ignition plug, part number 12122455258, is a proven choice for remapped and stock vehicles alike. It is the same factory unit used by BMW on higher output B58TU applications, giving excellent combustion stability under increased boost and cylinder pressure. Ideal for Stage 1 and Stage 2 calibrations and a smart option when running an uprated turbo.\n    \u003c\/p\u003e\n    \n    \u003cp\u003e\n      We have installed these on our own builds and for many customer cars with superb results. Expect crisp throttle response, smoother idle quality and reduced risk of misfire when pushing performance. Pre-gapped by BMW for direct fitment and easy servicing.\n    \u003c\/p\u003e\n    \n    \u003ch3\u003eKey benefits\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003eGenuine BMW OE component for exact fit and dealership-level reliability\u003c\/li\u003e\n      \u003cli\u003eSupports remapped engines and higher boost pressure on B58 and B58TU platforms\u003c\/li\u003e\n      \u003cli\u003eStrong, consistent ignition under load for tuned road cars and daily drivers\u003c\/li\u003e\n      \u003cli\u003eFactory set gap - install and go with no guesswork\u003c\/li\u003e\n      \u003cli\u003eExcellent cold start behaviour and smooth running\u003c\/li\u003e\n      \u003cli\u003eTrusted by enthusiasts and tuners seeking an OEM-plus upgrade\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003ch3\u003eFitment highlights\u003c\/h3\u003e\n    \u003cp\u003e\n      Perfect for B58-powered performance models including:\n    \u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eM140i F20 F21\u003c\/li\u003e\n      \u003cli\u003eM240i F22 F23\u003c\/li\u003e\n      \u003cli\u003eM340i G20 G21\u003c\/li\u003e\n      \u003cli\u003e340i F30 F31\u003c\/li\u003e\n      \u003cli\u003e440i F32 F33 F36\u003c\/li\u003e\n      \u003cli\u003e540i G30 G31\u003c\/li\u003e\n      \u003cli\u003e740i G11 G12\u003c\/li\u003e\n      \u003cli\u003eX5 xDrive40i G05\u003c\/li\u003e\n      \u003cli\u003eX7 xDrive40i G07\u003c\/li\u003e\n      \u003cli\u003eZ4 M40i G29\u003c\/li\u003e\n      \u003cli\u003eToyota GR Supra A90 3.0\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003e\n      BMW also lists this plug for a wide range of additional petrol models and years, including selected 2 Series F45 F46, 3 Series G20, 5 Series G30 G31, 6 Series G32, 7 Series G11 G12, i8 I12 I15, X1 F48, X2 F39, plus MINI F54 F55 F56 F57 F60 within the dates shown by BMW. If you need a deeper compatibility check, we can help before you buy.\n    \u003c\/p\u003e\n    \n    \u003ch3\u003eImportant notes\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003eDesigned for B58TU applications and widely used on Gen 1 B58 engines as an upgrade for Stage 1 and Stage 2 maps or bigger turbos\u003c\/li\u003e\n      \u003cli\u003eSold individually - most straight-six B58 engines require 6 plugs for a complete set\u003c\/li\u003e\n      \u003cli\u003eBMW part number: 12122455258 (also written as 12 12 2 455 258)\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003ch3\u003eNeed us to confirm fitment?\u003c\/h3\u003e\n    \u003cp\u003e\n      Unsure if 12122455258 is correct for your vehicle? At checkout, add your UK registration or the last 7 of your VIN and we will verify compatibility so you order with confidence.\n    \u003c\/p\u003e\n    \n    \u003ch3\u003eProfessional fitting\u003c\/h3\u003e\n    \u003cp\u003e\n      Want it installed properly the first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.\n    \u003c\/p\u003e\n    \n    \u003ch3\u003eManufacturer and warranty\u003c\/h3\u003e\n    \u003cp\u003e\n      Manufacturer: BMW\n    \u003c\/p\u003e\n    \u003cp\u003e\n      Warranty: Two years for UK customers and one year for international customers, when a valid VIN is supplied at checkout on compatible vehicles.\n    \u003c\/p\u003e\n    \n    \u003ch3\u003eSearch-friendly terms\u003c\/h3\u003e\n    \u003cp\u003e\n      B58TU ignition plug, B58 performance plug, OE BMW ignition, BMW 12122455258, direct replacement plug B58, M140i plug upgrade, M240i ignition service, M340i tuned plug, 340i remap plug, 440i upgrade ignition, 540i service parts, 740i ignition plug, X5 40i plug set, X7 40i plug, Z4 M40i plug, GR Supra A90 3.0 ignition plug, pre-gapped BMW plug, high boost ignition, OEM-plus B58 upgrade.\n    \u003c\/p\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"BMW","offers":[{"title":"Default Title","offer_id":55975893336450,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/GenuineBMWB58Stage2SparkPlug_Inc.M240i_M340i_X540i_1946x_d9e5a11c-52db-406b-8ab5-133811992016.jpg?v=1763323070","url":"https:\/\/mjmodifications.co.uk\/products\/genuine-bmw-b58-tu-high-power-stage-1-2-spark-plug-inc-m240i-m340i-x5-40i","provider":"MJ Modifications","version":"1.0","type":"link"}