Burger Motorsports JB4 BMW N55 PWG (Pneumatic Wastegate) Tuning Box/Performance Chip - Plug & Play Piggyback ECU Tuner for F20/F21 M135i, F22 M235i, F30/F31 335i, F32 435i, ActiveHybrid 3 - Stage 1/2 Power Module - Up to +60-100whp

BMW N55 PWG power upgrade by Burger Motorsports JB4

Transform your F-series 6-cylinder turbo with the BMS JB4 power module for Pneumatic Wastegate vehicles. This clever plug-in unit delivers serious gains without opening the ECU, keeping factory safeguards intact while sharpening response, midrange punch and top-end pull. On a standard car you can see increases of up to 60 whp, and on a fully breathed-on setup with supporting hardware and suitable fuel you can see up to 100 whp, all with the refinement you expect from BMW.

We run JB4 on our own cars and customer builds, and the feedback is consistently positive for reliability, drivability and value. If you want a fast, reversible, no-flash solution that simply works, this is it.

Highlights

• Substantial wheel horsepower and torque gains on PWG N55 engines
• Simple plug-in harness using OEM-style connectors - fully reversible
• Multiple user-selectable maps with in-cabin switching
• Boost by gear for improved traction on road and track
• Supports super unleaded, race petrol and ethanol blends
• Built-in fault code read and clear functionality
• Free firmware updates for future features and improvements
• Optional BMS Data Cable for laptop data logging and map tweaks
• Optional JB4 Mobile Bluetooth kit for smartphone app control

Who is this for

Ideal if you want a strong performance uplift without an ECU remap. The JB4 is a tuner's favourite for daily-driven cars and weekend builds alike, giving you a removable, feature-rich tuning solution that plays nicely with typical bolt-ons like intakes, intercoolers and exhaust systems.

Wastegate type - PWG only

This listing suits BMW N55 engines with a Pneumatic Wastegate. If your N55 uses an Electronic Wastegate from approximately July 2013 onward, you will require the EWG-specific JB4. Not sure which you have? Get in touch and we will confirm for you.

How to identify your wastegate type

What you get

• F-chassis N55 JB4 unit for PWG applications
• OBDII interface cable

Vehicle compatibility

BMW 1 Series

• 2012 to July 2013 F20 F21 M135i with N55 PWG

BMW 3 Series

• 2012 to July 2013 F30 F31 335i and 335ix with N55 PWG
• 2012 onward F30 ActiveHybrid 3
• 2013 to July 2013 F34 335i xDrive GT with N55 PWG

Real-world gains and dyno results

Results vary with hardware, fuel quality and map selection. Typical improvements are up to 60 whp on a factory car and up to 100 whp on a modified setup. Delivery remains smooth and OEM-like thanks to intelligent CANbus integration.

Installation and fitting

Designed for straightforward installation with a clip-in loom. No cutting, coding or permanent modification, and the unit can be removed at any time.

Prefer professional fitting. MJ Modifications offers installation in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Compatibility check before dispatch

For peace of mind we can verify fitment before shipping. Add your UK registration or the last 7 characters of your VIN at checkout and we will confirm that this PWG version is correct for your car.

Notes

• JB4_F30 shipments as of 15-11-2014 include the FlexFuel add-on connector.
• The EWG add-on connector remains optional and is used for higher power applications where direct EWG control is required.
• F10 models should verify sensor type before ordering. This does not apply to F30 models.

Part number

F-N55-F30-JB4-PW

Manufacturer and warranty

Manufacturer: Burger Motorsports

Warranty: 5 Year BMS Repair Warranty

Why buy from MJ Modifications

Expert BMW performance specialists in Warwickshire with hands-on experience of JB4 on N55 PWG platforms. Real-world setup advice, friendly support and happy customers who love the way their cars drive after this upgrade.

Optional JB4 software and videos

JB4 Optional Phone Software

Change maps on the fly

JB4 S55 CAN Flap Demo

JB4 Optional Startup Gauge Sweep

Search-friendly terms

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