ESS N55 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 or HFC option is not available for customers in California.
Part number: 101-103
Top Speed Governor: Removed
RPM Limit: 7100RPM
Fuel requirement: 91-93US/ 98Euro
Horsepower: 360 DIN (Stock 306)
Torque: 490NM (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 N55, 335i N55 from 2010 2011 2012