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BMS BMW N20 N26 JB4 Tuning Box (220i, 320i, 420i & 520i)


  • £494.04
    exc. VAT £411.70

In Stock


The N20 / N26 JB4 expands upon the popular N20 / N26 Stage1 tune with CANbus functionality. This allows for multiple maps which can be changed in dash, built in diagnostics including code reading/deleting, ethanol support, and much more to come with free software updates.

Click here for the latest firmware, settings, and directions for the N20 N26 JB4.


Compatibility Check

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 



2 Series:
• 2014+ 2 Series F22/F23 220i/228i N20 & N26

3 Series:

• 2012+ 3 Series F30/F31 320/328 N20 & N26

4 Series:
• 2014+ 4 Series F32/F33 420/428 N20 & N26

5 Series:
• 2011-2016 5 Series F10 520/528 N20 & N26

X Series
• 2011–2017 F25 X3 xDrive20i, xDrive28i

E chassis X1 and Z4:
• 2013-2016 E89 Z4 28i
• 2013-2015 E83 X1 28i/iX

BMS BMW N20 N26 JB4 (220i, 320i, 420i & 520i) Install Guide

328i Pump Gas Dyno (Click to enlarge)

BMS BMW N20 N26 JB4 (220i, 320i, 420i & 520i) - 328 Pump Gas Dyno - ML Performance UK


320i JB4 Dyno (Click to enlarge)

BMS BMW N20 N26 JB4 (220i, 320i, 420i & 520i) - 320 JB4 Dyno


328i E85 Dyno (Click to enlarge)

BMS BMW N20 N26 JB4 (220i, 320i, 420i & 520i) - 328i E85 Dyno



Free Next Day UK Delivery

FREE UK next day delivery on stock items if ordered before 11am! We can also ship worldwide, simply contact us for a quote.



5 Year BMS Repair Warranty


Manufactured by

Burger Motorsports


Part Number


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