BMS/Burger Motorsports JB4 Tuning Box for BMW N20/N26 (220i 228i 320i 328i 420i 428i 520i 528i | F22 F23 F30 F31 F32 F33 F10) Plug & Play ECU Piggyback, E85 Compatible, Up to +100whp

JB4 Performance Module for BMW 2.0 Turbo Petrol N20 N26 – instant, reversible power for F-Series BMWs

Looking for an easy, risk-free way to wake up your 2.0 turbo BMW without a permanent ECU flash? The JB4 performance module from Burger Motorsports is the proven plug-in power upgrade for the N20 and N26 engines found in the 220i, 228i, 320i, 328i, 420i, 428i, 520i and 528i. It delivers serious gains, sharper throttle response and smarter boost control while keeping your factory calibration intact. No coding, no cutting, no drama.

On a standard car you can see increases of up to 50 wheel horsepower, and with supporting hardware the JB4 can deliver up to 100 wheel horsepower. Expect a huge jump in mid-range torque, stronger in-gear acceleration and effortless overtakes. It is a brilliant remap alternative that you can enable or disable from the driver’s seat and remove at any time.

Why enthusiasts choose this power module

• Real-world performance: up to +50 whp on stock vehicles, up to +100 whp on cars with complementary mods and quality fuel
• True plug-in solution: fully reversible tuning with no permanent DME write
• On-the-fly map switching through CAN integration for different fuel and hardware setups
• Per-gear boost management for traction and drivability
• Ethanol blend support including E85 for enhanced power when available
• Cluster boost display and BC button control for the exhaust flap
• Built-in safety systems plus fault code read and clear functionality
• Free firmware updates to keep your module current
• Not VIN locked, so you can move it to another compatible BMW later

Connectivity and control

Pair your unit using the optional JB4 Mobile connect kit for Bluetooth control on compatible iOS and Android devices, or use a Windows laptop with the BMS data cable. Log runs, analyse data, change maps and update firmware as new features are released. The JB4 Mobile app is a separate purchase.

Compatibility

For BMW models equipped with the N20 or N26 2.0 turbo petrol engine:

• 2 Series: 2014+ F22 F23 220i, 228i
• 3 Series: 2012+ F30 F31 320i, 328i
• 4 Series: 2014+ F32 F33 420i, 428i
• 5 Series: 2011 to 2016 F10 520i, 528i
• X Series: 2011 to 2017 F25 X3 xDrive20i, xDrive28i
• E chassis: 2013 to 2016 E89 Z4 28i, 2013 to 2015 E83 X1 28i and xDrive28i

Note for X1 and Z4: These applications use special firmware with full dash control and a different CAN mounting location.

Installation and support

Installation is quick at home using the supplied plug-in harness. Because there is no ECU flashing, your factory software remains untouched and the module can be removed for servicing or resale. Prefer professional fitting? Book expert installation with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Tried, tested and loved

We run this unit on our own N20 development car and it has been flawless for daily driving and weekend blasts. Our customers consistently report smoother delivery, a big uplift in mid-range pull and the convenience of switching maps to suit fuel quality and bolt-ons. It is a serious performance upgrade that delivers every time.

Key features at a glance

• Up to +50 whp on stock cars, up to +100 whp with supporting mods
• Enable or disable tuning from the cockpit
• Per-gear boost tuning for improved traction
• E85 compatible mapping for ethanol blends
• Fault code reading and clearing built in
• Advanced engine protection strategies
• Boost display in the instrument cluster and BC button exhaust flap control
• Free firmware updates, datalogging and virtual gauges via JB4 Mobile or BMS data cable
• Transferable between compatible vehicles

Part number

F-N20N26-JB4

Manufacturer and warranty

Manufacturer: Burger Motorsports

Warranty: 5 Year BMS Repair Warranty

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