KESS V3 vs Flex

Alientech Kess3 and Flex are two of the most powerful ecu programming tools on the aftermarket.

Both of these best tools have their own unique features and capabilities, which make them ideal for a wide range of users, master tools from professionals to enthusiasts.

Which device is better to choose?

Kess V3 Vs Flex


Kess3 is a versatile tool that offers a range of tuning options for software, making it an ideal choice for professionals and enthusiasts alike.

Kess3 is known for its user-friendly interface, reliable performance, and compatibility with a wide range of engine models and brands.

One of the main advantages of Kess3 is that it is equipped with the most powerful microprocessor on the market, which is seven times more powerful than the previous generation. This means that Kess3 can execute your commands reliably, faster, and more efficiently. This tool is also used for obd port boot mode and ecu data. Another advantage of Kess3 is its automatic and instant recognition of the right communication line, which allows it to work faster using only an OBD cable. This makes Kess3 an easy-to-use and convenient option for those who want to tune their engine without any hassle. However, Kess3 can be expensive compared to other engine tuning tools, and it may require a stable internet connection for updates and database downloads. Additionally, Kess3 has limited customization options compared to Flex.


Kess3 Pros:

  • Powerful microprocessor
  • More potent than the earlier generation
  • Reliable execution of commands
  • Good technical support
  • Faster and more efficient performance
  • Automatic and instant recognition of the right communication line
  • New kess v3 combines kess and ktag into 1 tool, you buy the protocols then so you can buy just obd protocols and use like kess was or you can also buy all bench protocols like ktag

Kess3 Cons:

  • Can be expensive
  • Requires stable internet connectivity




Flex, on the other hand, is a highly customizable engine tuning tool that provides a comprehensive set of tools for engine calibration and testing. It allows users to create custom maps and configurations for specific engines, making it a highly adaptable tool for those who need more control over the tuning process. Flex is compatible with a wide range of engine models and brands, and its user-friendly interface makes it easy to use. One of the main benefits of this master tool is its ability to handle advanced and repair jobs with ease. The Flexbox module can detect eventual connection or communication errors, making it a reliable and efficient tool for engine tuning. Flex is the most advanced off All with updates exclusive protocols but all off them high prices. However, Flex can be relatively difficult to use for beginners and may require more configuration and setup than other engine tuning tools.

Flex Pros:

  •  Perfect for advanced and repairing jobs
  •  Flexbox module
  • Detects eventual connection or communication errors

Flex Cons:

  •  Hard to use for beginners
  • Requires more configuration