BMW X5 E70 Siemens MSV80 ECU Chip Tuning Guide

A BMW X5 E70 3.0L 2008 model year with a burning on the dashboard, the CHECK ENGINE indicator flashes and failures:

  • 29F4 – Catalytic-converter conversion
  • 29F5 – Catalytic-converter conversion (Bank 2)


Poor performance of the catalyst, decided to cure a dynamic version of the firmware.


How was the process of chip tuning BMW X5 E70 3.0L

The engine in this vehicle control unit controls the Siemens MSV80 . For reading and writing of EEPROM unit used KESS V2 master ecu programmer , which work indiscriminately passed ECU through the vehicle diagnostic connector.


The process is not fast, so be sure to connect the charger.


KESS V2 connect to the car.


Read the firmware of ECU.


And records the dynamic version of the software, with a fall in the rate of toxicity.


  • firmware version is optimized for standards Euro2
  • allows the complete removal of the catalyst and a second oxygen sensor
  • reduced opening temperature of the thermostat at partial loads, from 110 to 100 degrees Celsius
  • turns off the fuel supply of 7200 rev / min
  • maximum power increased from 272 kW to 305 kW
  • Torque increased from 315 Nm to 353 Nm

Ktag Master V6.070 Plus V2.35 Kess V2 With Unlimited Token ECU Programmer Plus Professional DPF+EGR Remover 3.0


About eobd21

I am a car lover and like to repair car by myself, and know more info about car diagnostic tool and other obd2 tools, share these info with everyone.
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