The difference between a slave tuning tool and a master tuning tools explained?

If you are looking at buying tuning tools, one of the first decisions will be, do you want to buy a master tuning tools and software, or a slave tuning tool, but what is the difference between the two tools and which one is right for you?

Salve tuning tool and master tuning tools

VIEZU can help with your choice, and support your set-up and tuning with either option. Viezu also offer initial training and demonstrations free too – we want to make sure you make the right choice for yourself and your tuning business

Most tuning tool suppliers offer two types of set-up, slave tuning tools and master tuning tools, and sometimes master file editing software too.

Slave tuning tools Vs Master tuning tools – whats the differences……

Slave or Master 

Do they look the same? Yes. Yes.
Do they tune the same vehicles? Yes. Yes.
Do they operate the same way? Yes. Yes.
Can I read and write a file to a vehicle? Yes. Yes.
Can I edit the file that is read No. (read and write only)



Slave Tuning Tools can read and write a file from a vehicle. However, the tool cannot open the file for editing or medication.

Yes. (and only with map editing software)
Is the tuning tool  linked to a Master Yes.


This tool will only be in service when it is paired or linked to a Master Tuning tool

Can I write files from any file provider? No. you can only take Files from the Master Tuning System your Slave Tool is paired to. Yes. You can obtain Files from any source – including making your own (provided you have the map editing software and training to use the software).


With the right software and training can write his one files, and / or buy modified files from an unlimited number of file suppliers.


Can I be linked to more than one Master Tuning System
No. Not applicable.
Can I take a modified file from another Master Tuning System
No. Yes.
Can I open a File to see the maps?
No. Yes. Master tools can read open un-encrypted files
Can I change to a different Master


Your Master may not want you to know this but yes you can move and become paired to a different Master!

You must obtain “permission” from your Master to move to another Master however!

Not applicable. You are a Master!



Can I upgrade my tool to become a Master in the future? Yes.



Many Master’s don’t tell you this, but this tool can be upgraded.

VIEZU can support the release of your Slave Tuning Tool to become a Master and can support with Training, Technical Advice and Tuning Files.

Not applicable.



VIEZU can support Master system operators with Training, Technical Advice and Tuning Files.

Is there a risk my Master wont release my Slave Tool? Yes. Not applicable.



Can I see the product being demonstrated? Yes. Contact to arrange a visit and appointment.



This is a Free no obligation demonstration, the only commitment is your time and ours!

Yes. Contact to arrange a visit and appointment.



This is a Free no obligation demonstration, the only commitment is your time and ours!

We hope that covers some of the key differences between the two tool options.  Slave tuning tools can also be upgraded to the master tuning tools platform too, you only have to pay the difference between the price of the two different tools. But, you can only upgrade if your current master gives permission to the upgrade. Viezu will always allow this upgrade.


Salve tuning tool and a master tuning tools

The VIEZU technical and training teams are on hand to help with any questions and, you can contact us here. Contact VIEZU.

If you are looking for professional tuning tools and software – check out the Remap 101 Shop Here