Firmware for BMW 318i body E90,
engine: 2.0 petrol,
control unit: Bosch MEV17. 4. 6,
software version: 1037503688 0087480QB00BBPGY3,
in the firmware, the catalyst control is disabled (Euro 2), and chip tuning is made with an increase in power and torque by 10%. You can disconnect the connector to the lower oxygen sensor.