Burger Motorsports JB4 Tuner - 2011-2013 BMW 135i & 335i (E Chassis N55)

The JB4 from Burger Motorsports is a piggyback tuner for E chassis BMWs with the N55 3.0T inline six. It installs between the factory sensors and the DME to reshape boost, timing and fueling while your stock ECU tune stays in place, and the current unit ships with the JB4PRO Bluetooth adapter and free JB4PRO app built into the enclosure.Burger Motorsports publishes N55 power gains of up to 60hp and 60tq to the wheels on a stock vehicle, and up to 100hp to the wheels (120hp at the crank) on a fully modified car.Important Compatibility InformationThis JB4 ships in two wiring harness variants, Harness A and Harness B, and the split is by vehicle build date rather than by model. Harness A generally suits earlier build dates and Harness B suits later build dates, but the exact cutoff varies and BMS describes it in terms like 'most' and 'some' rather than a hard date. Check your build date or VIN before ordering, and if you are not sure which harness matches your car, contact your BMP Tuning rep rather than guess.Features
Full CANbus and OBDII integration for real-time tuning strategy, gauge readouts and safety monitoring
Safety strategy holds boost low until oil and coolant are up to temperature, and drops to a low-boost map if the engine overheats, runs lean, knocks excessively or overboosts
Up to 8 preloaded maps for different fuel grades and modification levels, switchable on the fly
Reads and deletes fault codes, and displays and logs up to 40 engine parameters in real time
Boost by gear control for traction off the line
E85 and ethanol blend support through dedicated maps
Controls exhaust flap operation on supported vehicles
Billet aluminum enclosure, designed and assembled in the USA
Not VIN locked; removes cleanly and moves between vehicles
What's Included
JB4 tuner unit in a billet aluminum enclosure
Harness A or Harness B plug-and-play wiring harness, matched to your build date
JB4PRO Bluetooth adapter and free JB4PRO app, built into the enclosure
Ownership NotesThe JB4 stays on the last map and settings you selected, so you only need to connect to change maps, watch live data or update firmware. 91 octane or better is required to see the published gains. For a Windows-laptop connection path, Burger Motorsports also offers a JB4 data cable. If you're also upgrading your intake, see the E chassis N55 performance intake.Product Specifications
SKU: B00Y BM-JB4-N55-A (Harness A) / B00Y BM-JB4-N55-B (Harness B)
MPN: BM-JB4-N55-A / BM-JB4-N55-B
Fits E chassis BMW models with the N55 3.0T inline six
Need a Different JB4?Burger Motorsports also builds JB4 tuners for the rest of the N-series BMW lineup: the F chassis N55 tuner for the newer-generation version of this same engine, the N54 tuner, the G80/G82/G83 M3/M4 tuner, and the F97/F98 X3M/X4M tuner.Frequently Asked QuestionsDoes the JB4 replace or reflash my factory ECU tune?No. It is a piggyback controller that installs between the factory sensors and DME, adjusting boost, timing and fueling while your stock ECU tune stays in place.How do I know which harness I need?The split is by build date rather than model, and the exact cutoff varies, so check your build date or VIN. If you're not sure, contact your BMP Tuning rep before ordering.How much power does it add?Burger Motorsports publishes up to 60hp and 60tq to the wheels on a stock car, and up to 100hp to the wheels on a fully modified car.Do I need a separate app or Bluetooth adapter?No. The JB4PRO Bluetooth adapter and free JB4PRO app are built into the enclosure and included with this tuner.Is my E chassis different from the F chassis N55 tuner?Yes. This listing is built for the E chassis N55; the F chassis N55 uses the tuner linked above. Confirm your chassis before ordering, or contact your BMP Tuning rep if you're unsure.