Firmware for VW Passat B7,
engine: 1.4 TSI, petrol CAXA,
control unit: Bosch MED 17.5,
software version: 1037528989 03C906016DK_4771,
the firmware disabled the catalyst control (Euro 2) and made chip tuning with an increase in power and torque by 20%. You can remove the connector from the lower oxygen sensor.