E-Bike Tuning for Bosch Smart System (BES3): The Bosch Smart System, also known as BES3, represents the modern generation of Bosch e-bike drive systems. It is commonly found on newer Bosch e-bikes with components such as the LED Remote, System Controller, Mini Remote, Purion 200, Kiox 300, Kiox 500 or the eBike Flow App.

Compared to older Bosch BES2 systems, the Smart System uses a newer electronic architecture, different communication logic and, depending on the bike, different sensor concepts such as a classic spoke magnet or a modern rim / valve magnet. That is why Bosch Smart System tuning should always be selected according to the exact bike configuration.

For many compatible Bosch Smart System bikes, modern browser-based unlocking solutions are now available. The key solution is the EBTsmart Unlock Key for Bosch Smart System . It is designed for compatible Bosch BES3 bikes and can be used without permanently installing a classic tuning chip inside the motor.

If you are not sure whether your Bosch e-bike is a classic BES2 bike or a newer BES3 / Smart System bike, check the display, remote, eBike Flow App, BDU code, charging port, rim magnet, ABS and eShift configuration first. A helpful guide is available here: Bosch BES2 or Bosch BES3 – Identify Your Bosch E-Bike .

For a complete overview of the available digital Bosch unlock solutions, including FAQ, instructions, comparison and direct product links, visit: Everything about the Bosch Unlock Keys .

For classic Bosch BES1 / BES2 systems, the relevant product is usually the EBT Unlock Key . For newer Bosch Smart System / BES3 bikes, the relevant product is usually the EBTsmart Unlock Key .

Bosch Smart System bikes may include special configurations such as ABS, eShift, Gen4 Smart System, Gen5, rim magnet or classic spoke magnet. These details should never be ignored, because they can determine which unlocking method is suitable.

You can compare both Bosch unlock solutions here: EBT Unlock Key vs EBTsmart Unlock Key Comparison .

For setup and activation details, please use the official instructions: EBT Unlock Key Instructions and EBTsmart Unlock Key Instructions .

Important: The correct Bosch tuning solution depends on the exact system generation and bike configuration. Do not choose only by the motor name “Bosch CX” or “Bosch Gen4”. Always check whether your bike is BES2 or BES3 / Smart System and whether special features such as ABS, eShift or rim magnet are present.