BMS JB4 BMW N54 Tuning Box - 1M, 135i, 335i, 535i, Z4
Unlock serious power and response from your twin turbo BMW N54 with the Burger Motorsports JB4 plug and play tuning box. This proven N54 piggyback ECU tuner delivers huge gains, razor sharp throttle response and smooth OEM-like drivability. Ideal for BMW 1M, 135i, 335i, 335is, 535i, Z4 35i/35is and E71 X6 xDrive35i owners looking for a fast, reliable and reversible performance upgrade without a remap. Perfect for road, track and drag applications.
We have installed and run JB4 on our own N54 cars and our customers love the transformation. If you want a BMW N54 tune that is powerful, safe and feature-packed, the BMS JB4 is the go-to choice in the UK.
Optional extras for added functionality: add the Data Cable or the Bluetooth Connect Kit for JB4 Mobile app control, live gauges, datalogging and easy map changes from your smartphone.
Why choose the JB4 for your BMW N54
- Up to 100 hp and 100 lb ft to the wheels on a stock vehicle depending on fuel quality and conditions
- Even bigger gains with supporting mods - up to ~160 whp on factory turbos and up to ~350 whp on fully modified big turbo setups
- True plug and play installation with factory style connectors
- CANbus integration for unrivalled tuning features, safety and performance
- Selectable performance maps from the driver seat with stock bypass and valet modes
- Ethanol compatible mapping - E85 support when used as directed
- Progressive water methanol injection support with built-in failsafes
- Auto-tuning map that adapts to octane, climate, vehicle condition and modifications
- Optional in-dash boost gauge, programmable shift light and torque limiting for optimal launches
- Optional 2STEP rev limiter and no lift shifting for manual transmission cars
- Optional speed delimiter
- Runs smoothly like stock - how your N54 should have felt from the factory
- Fuel economy unchanged during normal driving
- Reads and deletes fault codes
- Not VIN locked - remove without trace and resell later
- Compatible with all driving modes and all ECU versions
What the JB4 delivers on the N54
Whether your car is completely stock on pump fuel or a fully built single turbo monster, JB4 offers the perfect blend of power, flexibility and safety. Install it as your first and only modification and enjoy a dramatic jump in performance. As you add intakes, exhausts, intercoolers, high octane or ethanol blends, or WMI, the JB4 grows with your build.
Current map list - N54 JB4 v32_12+ firmware
Last updated on 06.03.2020
- Map 0: Stock bypass
- Map 1: 13 psi - suitable for most racing applications
- Map 2: 14.5 psi - for cars with bolt-ons on 93 RM2 or higher octane
- Map 3: Progressive WMI mapping with failsafe
- Map 4: Stock map with CAN active - enables full logging and in-dash gauges on stock mapping
- Map 5: Autotuning map - 12 to 17 psi based on octane, conditions and mods, E85 compatible
- Map 6: User defined - generally for diagnostics or troubleshooting
- Map 7: Race gas map - 18.5 psi peak on G5 ISO, requires 100 to 104+ RM2 unleaded race fuel. Do not run leaded fuel. For E85 use, follow E85 back end flash and fueling guidance
- Map 8: Valet low boost map - may trigger 30FF on cars without back end flash
Built-in protections: cold and hot oil protection keep boost stock-like until oil is above 160°F and reduce boost above 280°F. Multiple safety systems can force a switch to Map 4 if boost, fuel pressure or AFR are out of range.
Compatibility - BMW N54 models
BMW 1 Series
- 2008 to 2010 E82 Coupe 135i
- 2008 to 2010 E88 Convertible 135i
- 2011 E82 1M
BMW 3 Series
- 2006 to 2010 E90 Sedan 335i and 335ix
- 2006 to 2010 E91 Touring 335i and 335ix
- 2006 to 2010 E92 Coupe 335i and 335ix
- 2007 to 2010 E93 Convertible 335i and 335ix
- 2011 to 2013 E92 335is
BMW 5 Series
- 2008 to 2010 E60 Sedan 535i and 535ix
- 2008 to 2010 E61 Touring 535i and 535ix
BMW X Series
- 2009 to 2010 E71 X6 xDrive35i
BMW Z Series
- 2009 to 2016 Z4 sDrive35i and sDrive35is
Transmission: fully compatible with DCT and manual transmissions.
Optional accessories
- JB4 Data Cable - for firmware updates, logging and map changes via laptop
- JB4 Bluetooth Connect Kit - use JB4 Mobile for smartphone logging, map switching and adjustments
Performance results
Videos
JB4 optional phone software overview
JB4 plug and play install guide
JB4 135i and 335i steering wheel controls demo
JB4 in-dash boost gauge and shift light demo
JB4 optional startup gauge sweep
Fitting and support
Prefer a professional installation and setup for your BMW N54 tune in the UK? We can fit and configure the JB4 at Nforcd in Warwickshire. Request a fitting quote via Sales@nforcd.com.
Compatibility check before dispatch
We verify fitment before shipping. Provide your UK registration number or the last 7 of your VIN at checkout to ensure the JB4 suits your vehicle.
Manufacturer, warranty and part number
Manufactured by: Burger Motorsports
Warranty: 5 Year BMS Repair Warranty
Part number: E-N54-JB4
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Ready to transform your N54? Add the JB4 to your basket today and experience a faster, stronger and smarter BMW.