The KESS3 is the latest ECU tuning tool from Alientech that replaces both the KESSv2 and K-TAG. KESS3 gives you more control than its predecessors, KESSv2 and K-TAG, and can be upgraded without the need to spend money on new hardware. This new tool allows users to remap in a faster, easier way than ever before, with the ability to use both OBD or Bench Tuning methods from the same device. The KESS 3 tool is the latest step in ECU tuning, which is faster and more powerful than its predecessors.