Summary of OPEN SOURCE KEY PROGRAMMER FOR HITAG2 KEYS
Hitag transponders in modern car keys prevent theft but raise duplication costs. Janne Kivijakola enabled a software-based method using a retired Renault reader connected to an Arduino Mega 2560 or Nano and the Windows program AESHitager to program Hitag2, Hitag3, Hitag AES, VVDI Super Chip, and some BMW keys. The project, with code and instructions, is available on GitHub and demonstrated in an accompanying video, offering a DIY solution for users facing coded-key issues.
Parts used in the Hitag transponder programmer project:
- Retired Renault reader tool (from junkyard)
- Arduino Mega 2560
- Arduino Nano
- Windows PC running AESHitager software
- Hitag transponder keys (Hitag2, Hitag3, Hitag AES)
- VVDI Super Chip
- Specific BMW keys supported by AESHitager
- Connection cables between reader and Arduino
Hitag transponders are employed in a wide range of car keys to prevent theft and unauthorized starting of vehicles. They are also a contributing factor to the increased cost of duplicating car keys for many models that incorporate this technology. Nevertheless, there is currently a software developer who collaborates with these transponder keys, all thanks to Janne Kivijakola.

The hack involves utilizing a retired reader tool obtained from a Renault in a junkyard, connected to either an Arduino Mega 2560 or Arduino Nano. Using this configuration, key transponders can be programmed using a software called AESHitager that operates on the Windows platform. It works with different Hitag transponders such as Hitag2, Hitag3, and Hitag AES, as well as the VVDI Super Chip and specific BMW keys.
If you’ve been having issues with coded keys, this project might just be what you need to sort your car out. Everything you need is available on GitHub for those wishing to try this at home. We’ve seen some interesting hacks in this space before, too. Video after the break.
Source: OPEN SOURCE KEY PROGRAMMER FOR HITAG2 KEYS
- What is required to program Hitag transponders in this project?
A retired Renault reader tool, an Arduino Mega 2560 or Arduino Nano, a Windows PC, and the AESHitager software are required. - Which transponder types does AESHitager work with?
AESHitager works with Hitag2, Hitag3, Hitag AES, VVDI Super Chip, and some BMW keys. - Can I use an Arduino Nano instead of an Arduino Mega 2560?
Yes, the project supports using either an Arduino Mega 2560 or an Arduino Nano. - Where can I find the project files and instructions?
The project and code are available on GitHub. - Is AESHitager a Windows application?
Yes, AESHitager operates on the Windows platform. - Do I need to buy a new reader tool for this project?
The project uses a retired Renault reader tool obtained from a junkyard, so a used reader is what the article describes. - Will this help if I have issues with coded car keys?
Yes, the article suggests the project can help sort out issues with coded keys. - Is there a demonstration of the project available?
Yes, the article references a video demonstration linked in the post.
