Site Information

 Loading... Please wait...
FREE Standard Shipping on Most U.S. Orders Details
  • Image 1
  • Image 2
  • Image 3

BMS JB4 E Series N55 Performance Tuner | E Chassis

Our Price:
Mgf Part #:

Other Details

1 Year MFG
* Type:
  • Best Prices. Price match guarantee
  • Authorized Dealer. Manufacturer warranty backed
  • In House Experts. We know products
  • Amazon Payments. Pay with your Amazon account

Product Details

How about up to 60hp to the wheels (80hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune. Including on the fly in dash map switching between factory and various performance maps, optional in dash gauge displays for boost and other critical engine parameters, progressive water/methanol support, ethanol fuels support, built in code reading, and much more.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization but for more advanced enthusiasts the BMS DATA cable allows you to connect via a laptop for data logging and free software updates.

Please see the picture above if unsure which harness (Type A 2011 & Some 2012 or Type B 2012+) you need.




Fitment Guide

BMW 1 Series

  • 2011-2013 N55 BMW E82 E88 135i LHD

BMW 3 Series

  • 2011+ N55 BMW E90 E91 E92 E93 335i/ix

BMW X Series

  • 2011+ N55 BMW X1


Installation Information

Installation Time

(approx) 20 Minutes

Difficulty Level

Simple installation for anyone

Installation Guides

How to Install

Product Videos

JB4 In dash boost gauge and shift light demo. 00:13

This is an optional feature that displays boost on the fuel gauge. Empty to full equals 0-20psi with half way being 10psi. The low fuel dummy light and miles to empty dash selection are not altered allowing this mode for long term use. Can be enabled/disabled from drivers seat.

  • JB4 In dash bo...
    This is an optional feature that displays boost on the fuel ga...
  • JB4 BMW 135i 3...
  • JB4 Add-On Blu...
    Note boost on fuel gauge is also enabled on this run. Result w...

Product Reviews

Write Review

This product hasn't received any reviews yet. Be the first to review this product!

Click the button below to add the BMS JB4 E Series N55 Performance Tuner | E Chassis to your wish list.