New Bosch Gen1–Gen4 Unlock Tool – No Chip, No Errors, Full Reset

[Jum-Ped]

I recently came across something that might interest fellow Bosch eBike users, especially those who are frustrated with traditional tuning chips and error codes. There's a new browser-based tool called the EBT Unlock Key which removes the speed restriction on Bosch motors (Gen1–Gen4) without requiring any physical installation or modification of the system. There's no need for a dongle or wiring, and – most importantly – no permanent changes are made to the system.

What sets this tool apart from other tuning solutions? You just need to connect your Bosch display (such as Intuvia, Purion, Kiox or Nyon) to a laptop via USB. It runs directly in the browser – there's nothing to install. Simply plug in, visit the website and enter your licence code. There are no error messages because it doesn't spoof wheel speed or sensor signals. It is reversible – you can reset everything back to factory settings in seconds. It works worldwide – once unlocked, the motor stays free of the 25 km/h limit unless you manually reset it.

Honestly, I’ve never seen anything like it. It feels like the first truly clean tuning method for Bosch BES1/BES2 motors. I used it on a Gen3 Performance Line CX with Intuvia and it worked flawlessly. The fact that it leaves no trace and avoids 504/505 errors is a huge bonus.

Here's the official info if anyone’s curious: https://www.mountaintuning.com/collections/bosch-tuning

 

[wildtrak]

Gen3 Performance Line CX

There is no such thing as a Gen 3 Performance Line CX.

 

[wildtrak]

well since two of those systems dont have any USB port and don't con next to a computer really anyway its bullcrap.

Even Gen 1 (not released in the USA) has USB via Intuvia (but not the old HMI)
All BES 2 bike computers have USB.
I guess this user just mixed up the Gen 3 with Gen 2 or Gen 4.

And I think I have seen this Software thing. Not sure, but sounds like some Bosch ebike guy has a side business.
Might be cheaper than paying $300 for a $10 tuning chip.

 

[Deacon Blues]

Just curious-how does a bike shop connect a Bosch motor ebike to their computer for upgrades?

 

[Base]

Just curious-how does a bike shop connect a Bosch motor ebike to their computer for upgrades?

Via a HMI with USB connection and the Bosch diagnose software or the online portal. For the Classic there was a special usb-assy which had to be placed on the display bracket and than the display would be connected on top of that. From BES1 onwards there has been an USB socket on the HMI

Pic from the interwebs

 

[Base]

There is also a standalone system to check battery packs

 

[Jum-Ped]

There is no such thing as a Gen 3 Performance Line CX.

I am familiar with this discussion. Yes, in principle that is correct. However, it is important that the environment in the picture (Internet, computer, normal USB data cable and just the Bosch e-bike) is sufficient to unlock the motor with a purchased license code. It is neither hardware nor software tuning, as no firmware is rewritten or a sensor signal is tricked out. More to find out: https://ebiketuning.com/

The motor is a Gen4 Performance Line CX (BES2) - sorry.

 

[Base]

It is a software tuning service so the firmware is changed inside the BDU, changing parameters is nothing different than changing the pulse ofthe speedsensor. Both illegal on public roads. And you void the warranty of the bike brand and Bosch.

 

[Jum-Ped]

It is not permitted on public roads and the liability and warranty of the manufacturer and its components expire, that is correct.

 

[smorgasbord]

From the link in the first post:

Does the display show correct speed?
Gen1: correct. Gen2–Gen4: half actual speed (technical limitation).

Is the odometer accurate?
No, after unlocking, mileage may be undercounted on Gen2–Gen4.

Seems to be spoofing wheel sensor speed. I don't know how the Bosch systems work, maybe this is as simple as setting the wheel diameter to half the actual diameter?

 

[Aushiker]

From the link in the first post:

Does the display show correct speed?
Gen1: correct. Gen2–Gen4: half actual speed (technical limitation).

Is the odometer accurate?
No, after unlocking, mileage may be undercounted on Gen2–Gen4.

Seems to be spoofing wheel sensor speed. I don't know how the Bosch systems work, maybe this is as simple as setting the wheel diameter to half the actual diameter?

These two aspects turned me off the idea, but if resetting wheel diameter is an option and it corrects, particularly the odometer accuracy, it may be worth reconsidering it.

That said, I would still like to see feedback from those who have actually used the software.

 

[Stefan Mikes]

A chip like Speedbox reports correct speed and odometer. The installation might be tricky though.
I admit my brother installed another chip for my Vado SL. It was a tricky work. I can turn the derestrictor on an off. Normally, I would be good with the 25 km/h restrictor but then I wouldn't ever be able to keep up with a gravel cycling group...

 

[Jum-Ped]

If you know a test user with a Bosch Gen2 to Gen4 motor (BES2), you are welcome to contact us and report here.

 

[Deacon Blues]

I purchased a Bosch unlock chip from epic eBikes over three years ago and have zero issues with it. The only precaution I take, to prevent the dreaded error code, is that I don't manually turn the bike off when I finish my ride. I let the bike chip/computer 'count down' on its own.
The chip doesn't affect the speed or odometer which is important to me. The biggest drawback is the price, but for me it was worth the investment.

 

[wildtrak]

I don't know how the Bosch systems work, maybe this is as simple as setting the wheel diameter to half the actual diameter?

I actually do that for free for my friends here or if I sell a motor.
Setting the wheel circumference to half shows half speed. Cuts off at real 40Mph or 50km/h. If you want to have it back to real speed, just put in a second spoke magnet.

I purchased a Bosch unlock chip

I made my own tuning chips for Bosch already in 2012. Did cost less than $10 at that time. We sold them for 99€ at that time. I still have a bag full of them left

 

[juggernaut1]

Sounds like the speed sensor trick is the way to double your speed on modern motors. Epic e-bikes sells a replacement speed sensor disc for the DJI Amflow to acheive 50 klms/hr……nice

Amflow Pl Carbon Speed Unlock Disc - Double Your Speed

Amflow Pl Carbon Speed Unlock Disc - Double Your Speed, Unlock to 50km/h Experience the thrill of unrestricted riding on private land and off-road trails.

epicebikes.com.au

 

[wildtrak]

Sounds like the speed sensor trick is the way to double your speed on modern motors. Epic e-bikes sells a replacement speed sensor disc for the DJI Amflow to acheive 50 klms/hr……nice

Amflow Pl Carbon Speed Unlock Disc - Double Your Speed

Amflow Pl Carbon Speed Unlock Disc - Double Your Speed, Unlock to 50km/h Experience the thrill of unrestricted riding on private land and off-road trails.

epicebikes.com.au

Just go to your local metal shop and they can make a disk like that for $20.
It is scary how easy they make it to get around the limiter.

That is no problem here in the Wild West. But for some European countries this will eventually have them change the laws. You are already screwed in some countries if the police catches you.

 

[juggernaut1]

Just go to your local metal shop and they can make a disk like that for $20.
It is scary how easy they make it to get around the limiter.

That is no problem here in the Wild West. But for some European countries this will eventually have them change the laws. You are already screwed in some countries if the police catches you.

Sure, but not worth my time going to a metal shop when I can order online in minutes and have it delivered to my door.

None of my e-bikes are limited to 25klm/hr. They were all available from the bike shops already unlocked to higher speeds with correct wheel diameters, speed and odometer readings.

 

[wildtrak]

None of my e-bikes are limited to 25klm/hr.

Same here, but for the Bosch I do it myself.
I even cranked up the torque by modifying the electronics. The one rebuilt Gen 2 Active Line that usually comes with 50Nm is now more powerful than the CX. As I had to replace all the bearings and gears after it was in the ocean bay, I just did a little soldering since I had it open anyway.
You cannot order that online

 

[Aushiker]

If you know a test user with a Bosch Gen2 to Gen4 motor (BES2), you are welcome to contact us and report here.

I have a Bosch motor but do not know of anyone who has tried the software, hence my curiosity.