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  • N55 306ps 91AKI/95RON
  • Stock US Spec M235i 91AKI/95RON

N55 (F) Stage 1 ECU Performance Software


Product Description

ESS N55 F series Stage 1 ECU software is a result of extensive testing and exact calibration of ECU parameters to allow significant performance gains on a stock or lightly modified car (intake/exhaust/IC). The Stage 1 software is developed and tested in extreme heat in the Arizona desert as well as extreme cold temperatures in Scandinavia. Typical gains are in the 40-45whp range. Catless exhaust option available upon request.

-ESS E-flash remote programming cable to switch between stock and ESS software versions/options ($345)



Part number: 101-103
Top Speed Governor: Removed
RPM Limit: 7100RPM
Fuel requirement: 91-93US/ 98Euro
Horsepower 2012: 360 DIN (Stock 306/320)
Horsepower 2013+: 400 DIN (Stock 306/320)
Torque: 500NM (Stock 400NM)
Installation is done through a ECU flash update, the ECU must be sent to a ESS reprogramming center for the software upload.



*Correction factor for drivetrain loss is 15% above RWHP as seen in dynograph (RWHP/0.85) Power rating is dependent on fuel quality.

Application intended for: All 135i,M135i,M235i,335i,435i,535i,640i,X3 3.5i, X5 3.5i N55 from 2012 2013 2014 2015 2016

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