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BMS BMW N55 JB4 Tuning Box for Pneumatic Wastegate (M135i & 335i)

Regular price $528.00 USD
Regular price $556.00 USD Sale price $528.00 USD
Price match

For N55 with the electronic wastegate (July 2013+), you will need the BMS N55 JB4 for Electronic Wastegate. Please contact us if you are unsure which wastegate you have, we would be more than happy to assist.

You may also wish to add the Data Cable or the Bluetooth Connect Kit for additional features.


Ready to take your twin turbo BMW to the next level?

How about up to 60hp to the wheels (80hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune. Including the ability to enable/disable the tuning from the drivers seat, gear dependent boost control to help with traction, ethanol and racing fuel support, built in diagnostic code reading/deleting, free firmware updates, and much more.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization but for more advanced enthusiasts the BMS DATA cable allows you to connect via a laptop for data logging and free software updates.

Note JB4_F30 shipments as of 11/15/2014 include the FlexFuel add on connector. This no longer needs to be purchased separately for these models. Also note the EWG add on connector remains optional and can be purchased separately for higher HP applications where direct EWG control is required.


Identifying Wastegate Type


F Chassis N55 JB4 (PWG)

OBDII cable


BMW 1 Series
2012 - July 2013 N55 BMW F20 F21 M135i

BMW 3 Series
2012 - July 2013 N55 BMW F30 F31 335i/ix

• 2012+ N55 BMW F30 Active Hybrid 3
• 2013 - July 2013 N55 BMW F34 335i xDrive GT

For E Chassis N54 JB4 Click Here


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.


F Series N55 JB4 Dyno results

BMW F Series N55 JB4 (M135, M235i, M2, 335i & 435i) Dyno - F30 335i with BMS intake, exhaust ML Performance UK
F30 335i with BMS intake, exhaust
BMW F Series N55 JB4 (M135, M235i, M2, 335i & 435i) Dyno - F32 435i with BMS intake, exhaust ML Performance UK

F32 435i with BMS intake, exhaust


BMW F Series N55 JB4 (M135, M235i, M2, 335i & 435i) Dyno - F22 M235i with intake, exhaust ML Performance UK

F22 M235i with intake, exhaust


BMS BMW F SERIES N55 JB4 (M135 M235I M2 335I 435I) | NEXT DAY DELIVERY ML Performance UK

F-N55-F30-JB4-PW (Pneumatic Wastegate)

Manufactured by

Burger Motorsports



5 Year BMS Repair Warranty


JB4 Optional Phone Software

Change maps on the fly:

JB4 S55 CAN Flap DEMO:

JB4 Optional Startup Gauge Sweep

F10 models will need to check their sensor type before ordering.
This does not apply to F30 models.

Click here for the latest JB4 firmware, map guide, and details.