OVERVIEW

Plug-and-play power for the E-chassis N55 with the factory DME left untouched. The Burger Motorsports JB4 reads and adjusts through the engine's own sensor network, so there is no flash, no VIN lock, and no trace once you unplug it. Figure roughly 20 minutes to install with hand tools.

The N55 changed connectors partway through production, so harness type matters more than model year alone. Type A covers most 2011 and some 2012 cars; Type B covers some 2011, most 2012 and all 2013+ cars, and right-hand-drive versions of both are available. If you are unsure, check the plug on your car before ordering — we are happy to help identify it.

SPECS

Up to 60 HP and 60 lb-ft to the wheels on a stock car
Up to 100 HP to the wheels on a fully modified car
Multiple switchable maps, including E85 ethanol blends
Boost-by-gear control for traction management
Live gauges, datalogging, and fault code read and clear
Harness Type A — most 2011 and some 2012 135 / 335 / X1 / X5 / X6
Harness Type B — some 2011, most 2012 and all 2013+ 135 / 335 / X1 / X5 / X6
Type A RHD and Type B RHD harnesses available for right-hand-drive cars
No ECU flash — the factory DME is left stock
Not VIN-locked; fully reversible
Approximately 20-minute installation with hand tools
Free firmware updates
5-year warranty
Designed and assembled in the USA

PARTS INCLUDED

JB4 tuner module in a billet aluminum enclosure
Plug-and-play installation harness in the selected type (A, B, A RHD or B RHD)
JB4PRO Bluetooth adapter, built into the unit
Free access to the JB4PRO smartphone app for iOS and Android

TECH RESOURCES

Additional Parts Required

91 octane or higher pump fuel — required for the advertised gains. An E85 blend is required for the ethanol maps.
Correct harness type — Type A, Type B, or the RHD equivalent must be selected to match the connector on your car.
JB4PRO mobile app (free, iOS and Android) — used for map switching, gauges, logging and fault codes. The Bluetooth adapter is built into the unit, so no separate connect kit is needed.
Optional: BMS Data Cable or JB4 Mobile cable for a wired laptop connection with additional gauges and datalogging.

Installation

BMS E Series N55 JB4 installation guide (PDF)

Notes

Burger Motorsports does not publish a catalog part number for this JB4, so no part number is listed; order by harness type. F-chassis N55 cars use a different unit — see the JB4 Tuner N55 F Chassis.

VEHICLE APPLICATIONS

Make	Model	Chassis	Engine	Years
BMW	135i Coupe (LHD)	E82	N55 3.0L Turbo I6	2011–2013
BMW	135i Convertible (LHD)	E88	N55 3.0L Turbo I6	2011–2013
BMW	335i Sedan (incl. xDrive)	E90	N55 3.0L Turbo I6	2011
BMW	335i Touring (incl. xDrive)	E91	N55 3.0L Turbo I6	2011
BMW	335i Coupe (incl. xDrive)	E92	N55 3.0L Turbo I6	2011–2013
BMW	335i Convertible	E93	N55 3.0L Turbo I6	2011–2013
BMW	X1 xDrive35i	E84	N55 3.0L Turbo I6	2013–2015
BMW	X5 35i (incl. xDrive)	E70	N55 3.0L Turbo I6	2011–2013
BMW	X6 35i (incl. xDrive)	E71	N55 3.0L Turbo I6	2011–2013