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BMS N63 + N63tu JB4 OBDII Performance Tuner | BMW 5, 6, 7, & X Series

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Product Details

The JB4 adds upon the Stage1 by including CANbus, full data logging, multiple performance maps, user adjustable fuel control, boost by gear settings, WMI support, JB4 Mobile wireless compatibility, and much more. Compatible both as stand alone tuning systems or in conjunction with performance flash maps where logging, safety, and fine tuning tools are desirable. Note these systems are BETA and the N63 and N63TU platforms do have various quarks and headaches when attempting to push higher power levels. See notes below for each application. We suggest these N63/N63TU JB4 systems for more experienced enthusiasts only who are not afraid to get their hands dirty, perform data logs, and fine tune things where appropriate.


F Series N63: Motor is misfire prone at higher boost levels, often requiring new plugs, coils, or fuel injectors. The JB4 attaches to the TMAP sensors for boost control, and includes optional fuel control wires which attach to the DME connectors using plug and play wiring pins. The BCM is an optional add on and suggested for those planning on running higher boost levels and also attaches to the DME connectors using plug and play wiring pins. While the system is technically plug and play and fully reversible, it does involve disassembling and reassembling the DME's electrical connectors to insert the pins. For beginning tuners we suggest NOT installing any of the DME wires and just running the JB4 with TMAP connectors & OBDII.

F Series N63TU: Requires the MAF sensors be unplugged while JB4 is active, which will result in a false alarm check engine light in dash unless passive delete is enabled in the JB4 interface. For boost levels over map1 extra fuel pressure wires are suggested which connect to the end of each fuel rail under the airboxes. 2016+ models generally use the "small B58" fuel pressure connector while 2014-2015 models generally use the "large N55" fuel pressure connector. We suggest verifying which ones you need before ordering the fuel pressure connectors to add on. The BCM is suggested for map levels over map1 and attaches to the boost solenoids under the passenger side intercooler.

G Series N63TU: Currently evaluating map1 levels only, which does not require extra fuel connectors or BCM attachment, but both are compatible similar to F series N63TU.





Fitment Guide

BMW 5 Series

  • 2011-2016 F10/F11 550i sDrive/xDrive
  • 2010-2016 F07 550i GT sDrive/xDrive
  • 2017+ G Series M550 G30 models

BMW 6 Series

  • 2012+ F12/F13 650i sDrive/xDrive

BMW 7 Series

  • 2009-2016 F01/F02 750i/750Li sDrive/xDrive

BMW X Series

  • 2014+ F15 X5 50i sDrive/xDrive
  • 2009-2012 E70 X5 50i sDrive/xDrive
  • 2007-2012 E71 X6 50i sDrive/xDrive


Installation Information

Installation Time

(approx) 20 Minutes

Difficulty Level

Simple installation for anyone

Installation Guides

How to Install

Product Videos

JB4 Add-On Blue Tooth Phone Logging DEMO with a new 2016 BMW M4 ZCP! 00:18

Note boost on fuel gauge is also enabled on this run. Result was 532whp on a full stock car running E30 fuel. See full dyno testing results on!

  • JB4 Add-On Blu...
    Note boost on fuel gauge is also enabled on this run. Result w...
  • F Series JB4 M...

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