Burger Motorsports (BMS) JB4 Tuning Box for BMW N55 Electronic Wastegate (EWG) – M135i, M235i, M2, 335i, 435i | Plug & Play Piggyback ECU | F20 F21 F22 F23 F30 F31 F32 F33 F34 F36

JB4 Power Module for BMW N55 EWG — F-Series M135i, M235i, M2, 335i, 435i

Turn your turbocharged N55 into the car it should have been from the factory with the Burger Motorsports JB4 performance module for Electronic Wastegate cars. This intelligent CANbus-controlled engine management upgrade delivers serious gains, razor-sharp throttle response and refined drivability, all with easy installation and full control from the cabin.

Real, repeatable results: up to 60 hp at the wheels on a standard car and as much as 100 whp on a well supported setup with typical bolt-ons. We run JB4 on our own N55s and our customers consistently rate it for the way it transforms mid-range torque and top-end pull while retaining OEM smoothness.

• For BMW N55 with Electronic Wastegate: M135i, M235i, M2, 335i, 435i
• Rapid-fit harness with OBD port link and CAN integration
• Change maps on the move via steering wheel controls or JB4 Mobile
• Gear-based boost by gear for traction and drivability
• Supports ethanol blends and water-meth injection
• Read and clear fault codes, log data, free firmware updates
• A proven alternative to a traditional remap with easy revert to stock

Who is this for

This version suits N55 engines with an Electronic Wastegate. If your vehicle has a Pneumatic Wastegate, you need the PWG-specific JB4. Not sure which you have? Get in touch and we will help you identify your setup before ordering.

What you can expect

• Stock hardware: gains up to 60 whp
• With typical supporting mods: gains up to 100 whp
• Retains factory safety systems and daily reliability
• Optimised boost control for fast spool and strong mid-range

Key features

• Plug-in harness for quick install and removal
• Enable or disable the module from the driver’s seat
• Boost by gear to maximise grip
• JB4 Mobile app or laptop interface for logging and updates
• Free firmware updates for ongoing improvements
• Diagnostic reading and clearing via the OBD connection

Optional extras

• USB Data Cable or Bluetooth Connect Kit for logging, map control and firmware updates
• EWG add-on connector to allow direct electronic wastegate control for higher boost ceilings on heavily modified cars using E85 or WMI. Not used on Map 1 or Map 2 even if installed

Note: JB4_F30 shipments since 15 November 2014 include the FlexFuel add-on connector for applicable models.

Vehicle compatibility

Fits the following BMW N55 Electronic Wastegate models:

• 1 Series: July 2013+ F20 F21 M135i
• 2 Series: 2014+ F22 F23 M235i, 2016+ F87 M2
• 3 Series: July 2013+ F30 F31 335i and 335i xDrive, July 2013+ F34 335i xDrive GT
• 4 Series: 2014+ F32 F33 F36 435i and 435i xDrive

Map guide

Select maps using the in-dash controls or via JB4 Mobile or laptop. Map 1 is the default.

• Map 0: Module inactive
• Map 1: Additive target, around 4 psi over stock
• Map 2: Additive target, around 6 psi over stock. Suits 98 RON and bolt-ons. Works with small E85 blends
• Map 3: Progressive WMI mapping
• Map 4: Stock performance with JB4 active for logging only
• Map 5: Autotuning map with absolute target of 11 to 17 psi based on fuel quality and conditions
• Map 6: User definable absolute target map for troubleshooting by professionals only
• Map 7: Race fuel map with absolute target of 18.5 psi. Requires straight unleaded race fuel

What’s in the box

• F-chassis N55 JB4 for Electronic Wastegate
• OBD cable

Wastegate identification

If you are unsure whether your N55 uses an Electronic or Pneumatic Wastegate, refer to the image below or contact us for assistance. We are happy to confirm the correct JB4 for your car.

Dyno results

Dyno-proven gains with typical bolt-on modifications:

F30 335i with BMS intake and exhaust

F32 435i with BMS intake and exhaust

F22 M235i with intake and exhaust

Installation and fitting

Installation is straightforward via the supplied harness. Prefer a professional fit and setup? MJ Modifications offers fitting in Warwickshire. Email info@mjmodifications.co.uk with your vehicle details for a quote and availability.

Compatibility check before dispatch

To ensure the part fits your vehicle, we run a compatibility check before shipping. Provide your UK registration number or the last 7 digits of your VIN at checkout or contact us directly.

Part number

F-N55-F30-JB4-EW

Manufacturer and warranty

Manufactured by Burger Motorsports with a 5 Year BMS Repair Warranty.

Videos

JB4 Optional Phone Software

Change maps on the fly

JB4 Optional Startup Gauge Sweep

Why buy from MJ Modifications

• BMW performance specialists with hands-on JB4 experience
• Helpful UK-based support and product knowledge
• Professional installation available in Warwickshire

Popular search terms

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