Ignitions and Electrical› Computers, Chips, Modules and Programmers

JB4

Plug-and-Play Performance Tuner

$750.00

SKU: N20 JB4

In Stock
In Stock
Ships by Aug 3
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The JB4 is a plug-and-play performance tuner module designed to increase turbo performance in compatible BMW vehicles. This device installs between your car's sensors and its DME/ECU, manipulating signals to achieve enhanced results. The JB4 tuner is compatible with 91 octane pump gas and comes with a 5-year warranty. This tuner is specifically designed for BMW vehicles equipped with N20 or N26 4-cylinder turbocharged engines. It is compatible with various models, including the 2 Series (2014-2016 F22/F23 220i, 228i), 3 Series (2012+ F30 320i, 328i), 4 Series (2013+ F32/F33/F36 420i, 428i), 5 Series (2012+ F10 528i), and select E-series models like the X1 (E84) and Z4 (E89). It's important to note that the X1 and Z4 applications are distinct from the F-series N20 JB4 and utilize special firmware.

MIA's Description

The JB4 is a plug-and-play performance tuner designed for turbocharged vehicles. It installs between your car's sensors and its DME/ECU, manipulating signals to enhance turbo performance. This tuner is compatible with 91 octane pump gas.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandJB4
Part NumberN20 JB4
CategoryIgnitions and Electrical

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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