For Bosch eBike riders who feel limited by the 25 km/h restriction, especially in Europe, a new browser-based unlock method has emerged that might be worth your attention. It's called the EBT Unlock Key, and it does something most tuning products haven't done before:

• No physical chip
• No app installation
• No firmware flashing
• No sensor spoofing Just a USB cable, a browser, and a one-time license code.

What exactly is it?

The EBT Unlock Key allows you to unlock the speed limit on Bosch eBike motors from Gen1 to Gen4, including:

• Classic
• Active Line / Active Line Plus
• Performance Line / Performance Line CX
• Compatible with Purion, Intuvia, Kiox, and Nyon (BES1/BES2 systems)

It does not work with Smart System (BES3) motors yet.

How does it work?

1. Connect your Bosch display (e.g. Purion or Intuvia) to your laptop via USB.
2. Visit the tuning site in your browser (Chrome, Edge, etc.).
3. Enter the license code you purchased.
4. Unlock – and optionally reset it later with one click.

There is no installation, no dongle, no tampering with wheel speed magnets. Since it doesn’t spoof sensor signals, it avoids error codes.

Key advantages:

• Fully reversible – return to factory settings at any time
• No hardware modification – nothing to hide or unplug
• No need for third-party apps or updates
• Cross-platform – works on Windows/macOS/Linux via browser
• Completely invisible once reset

It’s arguably the cleanest solution currently available for Bosch Gen1–4 systems.

More info:

Overview: https://ebiketuning.com/pages/ebt-unlock-key
Instructions: https://ebiketuning.com/pages/ebt-unlock-key-unlock-your-bosch-e-bike-in-minutes
FAQ: https://ebiketuning.com/pages/ebt-unlock-key-faq

Important legal notice:

As with all eBike tuning:

• This unlock violates traffic regulations in most countries (e.g. EU, Germany, etc.).
• Once unlocked, your eBike loses its legal status as a Pedelec and is no longer street legal.
• Insurance coverage is void when used in public traffic in tuned state.
• Manufacturer warranty and liability are forfeited after modification – even if reverted.
• This is strictly for private use on non-public roads or off-road terrain.

Use at your own risk. Be informed.