EBT Unlock Key – 4 Licenses for Bosch Gen1–Gen4 (except Bosch Gen1 HMI and Smart System)
Tuning for Four – One Bundle. Full Digital Freedom.
Ideal for e-bike groups, mobile mechanics, or tech-savvy riding circles – this 4× license pack lets you unlock four Bosch EMTBs with one purchase. No tools. No chip. No nonsense.
The EBT Unlock Key is a browser-based solution that removes the 25 km/h speed restriction on Bosch Gen1–Gen4 systems (except Smart System). Each license works once, per bike – permanently.
(URL after purchase)
Key Features
100% browser-based – no software install needed
Compatible with Bosch Gen1 (Intuvia display), Gen2, Gen3, Gen4 (BES2)
Not compatible with Bosch Gen1 (HMI display) and Bosch Smart System (BES3)
Permanent unlock – works even after battery or display replacement
Easily reversible – re-lock at any time via the same website
No chip, no motor disassembly, no risk
Secure and legal for private use (non-public roads)
Gen2–Gen4: speed display shows half the actual speed. Gen1 shows full, correct values.
Not all Gen4 motors are the same – the charging port tells you everything:
Bosch Gen4 motors exist in two versions with different electronic platforms:
Round charging port = BES2 → compatible with the EBT Unlock Key Square charging port = BES3 (Smart System) → not compatible
If you're unsure, check your charging port. If it matches the round plug shown below, your motor is supported.
How it works
Buy your license (4× EBT Unlock Key)
Receive your keys by email
Connect your e-bike via USB to a browser (PC or Mac)
Full compatibility list (Gen1–Gen4, Classic+, Active/Performance)
Quick start instructions for browser activation
No software install needed – just plug and ride
Why 4?
Great for mobile service providers or traveling riders
Perfect for tech-savvy friend groups or crews
Save time, reduce cost per unlock
Legal notice
This 4-license package of the EBT Unlock Key is intended exclusively for use with e-mountainbikes and must only be used on private property or designated off-road areas. It is not permitted for use on public roads in most countries. Any operation of modified e-bikes outside of applicable traffic laws may result in legal consequences. By purchasing this product, the user confirms full awareness of local regulations and accepts complete responsibility for any legal, technical, or safety implications.
Your EBT Unlock Key will be delivered immediately after your order – no waiting, no shipping delays. We believe in our product. If you're not satisfied or if any information provided turns out to be incorrect, you’re covered by our Money Back Guarantee – no questions asked.
EBT Unlock Key – Full FAQ
1. General Information
What is the EBT Unlock Key? The EBT Unlock Key is a browser-based software tool that unlocks Bosch motors (Gen1 to Gen4) by removing the 25 km/h speed limit.
How is it delivered? Exclusively via email. You receive a digital license code with instructions.
What makes EBT unique? 100% digital. No chip, no hardware, no app install – works directly in your browser.
Is the tool visible on the bike? No. The change is internal. There’s no trace of tuning visible externally.
Here you’ll find everything you need to know about Bosch e-bike motor generations, compatibility with the EBT Unlock Key, and how software tuning compares to hardware-based solutions. Jump directly to the section you're most interested in:
To help you better understand which Bosch e-bike motors are compatible with the EBT Unlock Key, we’ve included an overview of the differences between Gen1, Gen2, Gen3, and Gen4 systems. Learn which version you have – and whether browser-based tuning is possible.
Bosch’s first generation, often referred to as the Classic+ Line, includes systems with either HMI or Intuvia displays. The EBT Unlock Key only supports the Intuvia variant (BES1), which shows full and correct speed values. HMI displays are not supported. These early systems are typically found on older city or trekking bikes. Unlock Bosch Gen1 Classic+ Motor
Bosch Gen2 Tuning – Active & Performance Line (2014–2017)
Gen2 motors brought a significant step forward in Bosch’s evolution. These systems use BES1 connectors and are compatible with the EBT Unlock Key. However, due to system design, speed values are shown at half the actual speed when unlocked. This affects displays such as Purion, Intuvia, and Nyon. Unlock Bosch Gen2 Performance Line Motor
Bosch Gen3 Tuning – Active Line Plus & Performance (from 2018)
Gen3 systems marked Bosch’s transition to the BES2 connector (round plug). The EBT Unlock Key works well with these systems, but like Gen2, speed values appear halved on the display. Most commonly used on city and hybrid bikes, these systems offer a good balance between performance and weight. Unlock Bosch Gen3 Active Line Plus Motor
Bosch Gen4 Tuning – Performance Line CX (up to 2022)
Gen4 Performance Line CX motors are widely used in eMTBs and trekking bikes. The key distinction is between BES2 and BES3 versions. If your Gen4 motor uses the round charging port, it’s BES2 – and fully compatible with the EBT Unlock Key. If it has a square charging port and uses the Smart System (e.g., Kiox 300, LED Remote), it’s BES3 – and not compatible. Unlock Bosch Gen4 Performance Line CX Motor
Still unsure? Use our comparison table below or check the shape of your charging port. You can also email our support team with a photo – we’ll help you identify your system.
The following table provides a compact overview of all Bosch motor generations from Gen1 to Gen4 – including connector type (BES1, BES2), display compatibility, and browser-based tuning support via the EBT Unlock Key. Unsupported systems (e.g., Gen1 HMI, Smart System BES3) are clearly marked.
Compatibility Tip: Not all Gen4 motors are the same. There are two versions:
Gen4 with BES2 (round charging port): Compatible with the EBT Unlock Key
Gen4 with BES3 (square charging port / Smart System): Not compatible
In the UK and other markets, the BES3 version is often referred to as “Bosch Smart System” or “Performance Line CX with LED Remote.” If your Bosch Gen4 motor has a square charging port and uses a Kiox 300 or LED Remote, it is likely a BES3 system.
If you're unsure whether your bike uses BES2 or BES3, just compare your charging plug:
The EBT Unlock Key is compatible with the round plug version (BES2):
4) Comparison of software tuning and hardware tuning
There are many perspectives when it comes to tuning – and no one-size-fits-all solution. This comparison aims to help you find your own position by highlighting the differences between software-based and hardware-based tuning approaches.
While hardware solutions like tuning chips and dongles have been around for years, software tuning represents a modern, flexible, and minimally invasive alternative. It can be a valuable upgrade for technically savvy riders looking for control, reversibility, and convenience.
Comparison Table: Software Tuning vs Hardware Tuning
Bosch Software Licence Instructions – Unlock Your E-Bike with MountainTuning
Unlock your Bosch motor safely and permanently – without installing apps, external chips, or software!
The MountainTuning EBT Unlock Key offers the first pure browser-based method to unlock Bosch Gen1–Gen4 e-bike motors. A laptop (Windows or Mac), a USB cable, a steady internet connection, and your licence key are all you need.
Not compatible: Bosch HMI Display and Bosch Smart System (BES3)
Important Notice
Unlocking your Bosch motor will reclassify your e-bike. Public road use without registration and insurance may be illegal in many countries. Always check your local regulations. MountainTuning is not liable for misuse.
Important Notice Regarding E-Bike and E-MTB Tuning
Please be aware that modifying your e-bike or e-mountain bike through tuning – whether by software or hardware – may have significant legal, technical, and safety implications depending on your country or region.
Legal Considerations
Loss of street-legal status:
In many countries, tuning removes the vehicle’s classification as a standard e-bike or pedelec. As a result, it may no longer be legally used on public roads or cycle paths.
Restricted use:
Tuned e-bikes are typically only allowed on private property or designated off-road tracks and competitions, depending on local regulations.
Possible legal consequences:
Operating a tuned e-bike in public may lead to legal issues, such as:
Requirements for vehicle registration, insurance, and a driver’s license
Violations of traffic and insurance laws
In some countries, using an unregistered or uninsured tuned vehicle may result in fines or penalties
No liability or insurance coverage:
In the event of an accident, insurance providers may deny coverage, and victim compensation programs may not apply. This could lead to personal liability for damages or injuries.
Warranty voiding:
Any tuning may void manufacturer warranties and affect consumer rights.
Technical and Safety Risks
Increased mechanical stress:
By removing speed limitations or altering motor behavior, your e-bike is exposed to greater loads on brakes, drivetrain, and electronics.
Accelerated wear and reduced safety:
Components may wear out faster, and performance could be compromised, especially at higher speeds for which the bike was not originally designed.
Use at Your Own Risk
MountainTuning products are intended for private use only.
We do not recommend using tuned e-bikes on public roads.
By using any tuning product, you agree to take full responsibility for any legal or technical consequences.
Always check the laws and regulations in your country before making any modifications to your e-bike.
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