{"product_id":"bmw-b38-b46-b48-jb4-tuner","title":"Burger Motorsports JB4 Tuning Box Piggyback ECU Plug \u0026 Play with JB4 PRO Bluetooth and App for BMW B38 B46 B48 Engines","description":"\u003cp\u003eUnlock responsive, repeatable performance from your BMW with the JB4 Tuner for B38, B46 and B48 engines. This proven plug and play tuning box from Burger Motorsports delivers serious gains without ECU flashing, works with locked ECUs, and now includes the JB4 PRO Bluetooth adapter and free smartphone app as standard. Ideal as an easy first upgrade or to complement other bolt-ons, the JB4 offers on-the-fly map switching, powerful safety features and OEM-like drivability.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePlug and play piggyback tuner for BMW B38, B46 and B48 engines\u003c\/li\u003e\n  \u003cli\u003eGains of up to around 40 whp on a stock B48, with potential for more on higher octane fuel, ethanol blends and cars with supporting modifications\u003c\/li\u003e\n  \u003cli\u003eNo ECU flash required and compatible with locked ECUs\u003c\/li\u003e\n  \u003cli\u003eIncludes JB4 PRO Bluetooth adapter and free iOS\/Android app for map control, logging and firmware updates\u003c\/li\u003e\n  \u003cli\u003eOn-the-fly in-dash map switching between stock and performance maps\u003c\/li\u003e\n  \u003cli\u003eBoost by gear for improved traction in lower gears\u003c\/li\u003e\n  \u003cli\u003eBuilt-in data logging and fault code read and clear\u003c\/li\u003e\n  \u003cli\u003eDirect electronic wastegate control helps prevent throttle closure on cars with freer-flowing exhausts\u003c\/li\u003e\n  \u003cli\u003eExhaust flap control on most models\u003c\/li\u003e\n  \u003cli\u003eProgressive water\/methanol injection support\u003c\/li\u003e\n  \u003cli\u003eAdvanced CANbus OBDII integration for smooth, safe power delivery\u003c\/li\u003e\n  \u003cli\u003eEthanol E85 compatible maps available\u003c\/li\u003e\n  \u003cli\u003eNot VIN-locked, easily removed and resold later\u003c\/li\u003e\n  \u003cli\u003eRugged billet aluminium enclosure, designed and assembled in the USA\u003c\/li\u003e\n  \u003cli\u003eRuns smoothly like stock and works with all driving modes\u003c\/li\u003e\n  \u003cli\u003eFuel economy unchanged during normal driving\u003c\/li\u003e\n  \u003cli\u003e5-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMap overview: Map 0 stock bypass, Maps 1 to 3 for pump fuel increases, Maps 4 to 5 for higher target boost on high-octane or ethanol blends, Map 6 custom tuning, Map 7 progressive WMI, Map 8 valet\/low boost. The JB4 auto-detects B38, B46 or B48 at start-up for a simple set-up experience.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle compatibility\u003c\/strong\u003e\u003cbr\u003e\nFor BMW models equipped with B38, B46 or B48 engines, including (xDrive where applicable):\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e1 Series: F40 M135i, F40 128ti, F40 118i, F20\/F21 116i, 118i, 120i, 125i\u003c\/li\u003e\n  \u003cli\u003e2 Series: G42 220i, 230i; F22\/F23 218i, 220i, 225i, 230i; F44 M235i Gran Coupé\u003c\/li\u003e\n  \u003cli\u003e2 Series Active Tourer\/Gran Tourer: F45\/F46 216i, 218i, 220i\u003c\/li\u003e\n  \u003cli\u003e3 Series: G20\/G21 318i, 320i, 320e, 330i, 330e; F30 318i, 320i, 325i, 330i, 330e\u003c\/li\u003e\n  \u003cli\u003e4 Series: G22\/G23\/G26 420i, 430i; F32\/F33\/F36 418i, 420i, 425i, 430i\u003c\/li\u003e\n  \u003cli\u003e5 Series: G30 530i, 530e\u003c\/li\u003e\n  \u003cli\u003e6 Series: G32\/G33 630i\u003c\/li\u003e\n  \u003cli\u003e7 Series: G11\/G12 730i\u003c\/li\u003e\n  \u003cli\u003eX Series: F48 X1 28i; F47 X2 28i; G01 X3 2.0i; G02 X4 2.0i; G05 X5 30i\u003c\/li\u003e\n  \u003cli\u003eZ4: G29 Z4 20i, Z4 30i\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf your BMW has a B38, B46 or B48 engine and you do not see your exact model listed, contact Nforcd for guidance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat sets JB4 apart\u003c\/strong\u003e\u003cbr\u003e\nUnlike basic tuning chips, JB4 integrates with multiple sensors and CANbus to safely adjust boost, timing, fuel and trims in real time. You get significant, smooth power gains while retaining factory safety systems, plus full app control and ongoing free firmware updates. It is a favourite at Nforcd for its flexibility, reliability and ease of installation.\u003c\/p\u003e\n\n\u003cp\u003eNforcd stocks and supports the JB4 for BMW B38\/B46\/B48. Order today for fast UK delivery. Professional fitting is available at Nforcd in Warwickshire; request a quote at Sales@nforcd.com.\u003c\/p\u003e","brand":"Burger Motorsports","offers":[{"title":"F-Chassis \u0026 Early G30\/G11\/X1\/X2 (2014–2019) – Gen1","offer_id":55463290929537,"sku":"+PRO ADAPTER","price":778.7,"currency_code":"GBP","in_stock":true},{"title":"F-Chassis \u0026 Early G30\/G11\/X1\/X2 (2014–2019) – Gen1 ***CARB APPROVED***","offer_id":55463290962305,"sku":"+PRO ADAPTER","price":778.7,"currency_code":"GBP","in_stock":true},{"title":"G-Chassis (G20\/G22\/G42) Z4 (2019+) – Gen2","offer_id":55463290995073,"sku":"+PRO ADAPTER","price":778.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/9465\/6700\/files\/jb4-tuner-00002_2f5103d9-99cc-4f07-a0aa-e648439d8239.jpg?v=1774347705","url":"https:\/\/www.nforcd.com\/products\/bmw-b38-b46-b48-jb4-tuner","provider":"Nforcd","version":"1.0","type":"link"}