Uploaded November 2025 | Updated September 2026, 2 weeks ago
TL866 Programming msa12-4.4
n this video, I show how to remove the immobilizer (IMMO OFF) on an Audi A6 C4 MSA12 ECU using the 93C46 EEPROM.
You’ll see the real process on the bench, using a TL866 programmer, identifying the EEPROM, reading the dump, editing it for IMMO OFF, and writing it back successfully.
Identifying the correct EEPROM (93C46) on MSA12 ECU
TL866 chip profile selection (AT93C46, x8/x16)
Safe read, erase, and write operations
How to unlock (EWEN) and verify the EEPROM
Step-by-step IMMO OFF procedure
Bench test after programming
ECU: Bosch MSA12 (Audi A6 C4)
EEPROM: AT93C46 (DIP-8)
Programmer: TL866 / T48
Software: XGPro
📁 File Info:
Original and IMMO OFF dump files available – comment below if you want them (x8 & x16 versions).
⚠️ Disclaimer:
This content is for educational and repair purposes only. Do not use IMMO OFF modifications illegally on public roads. Always comply with your local regulations.
👍 Support the channel!
If this video helped you, hit LIKE, SUBSCRIBE, and leave a comment — it helps a lot!
🕒 Timestamps (suggested)
00:00 – Intro
00:40 – ECU overview (MSA12 structure)
01:30 – EEPROM location (93C46)
02:45 – Reading with TL866 (x8/x16)
04:30 – Editing dump for IMMO OFF
06:10 – Writing and verify process
07:20 – Bench test after programming
09:00 – Final notes and tips
🔖 Tags
Audi A6 C4, MSA12, Immo OFF, 93C46, EEPROM, TL866, ECU, Immobilizer, ECU repair, EEPROM programming, Bosch MSA12, AT93C46, EEPROM dump, TL866 programmer, bench test, ECU cloning, IMMO delete, car electronics, automotive diagnostics, ECU tuning, chip tuning, ECU bench setup, Audi ECU, VW Audi Group
TL866 Programming msa12-4.4
n this video, I show how to remove the immobilizer (IMMO OFF) on an Audi A6 C4 MSA12 ECU using the 93C46 EEPROM.
You’ll see the real process on the bench, using a TL866 programmer, identifying the EEPROM, reading the dump, editing it for IMMO OFF, and writing it back successfully.
Identifying the correct EEPROM (93C46) on MSA12 ECU
TL866 chip profile selection (AT93C46, x8/x16)
Safe read, erase, and write operations
How to unlock (EWEN) and verify the EEPROM
Step-by-step IMMO OFF procedure
Bench test after programming
ECU: Bosch MSA12 (Audi A6 C4)
EEPROM: AT93C46 (DIP-8)
Programmer: TL866 / T48
Software: XGPro
📁 File Info:
Original and IMMO OFF dump files available – comment below if you want them (x8 & x16 versions).
⚠️ Disclaimer:
This content is for educational and repair purposes only. Do not use IMMO OFF modifications illegally on public roads. Always comply with your local regulations.
👍 Support the channel!
If this video helped you, hit LIKE, SUBSCRIBE, and leave a comment — it helps a lot!
🕒 Timestamps (suggested)
00:00 – Intro
00:40 – ECU overview (MSA12 structure)
01:30 – EEPROM location (93C46)
02:45 – Reading with TL866 (x8/x16)
04:30 – Editing dump for IMMO OFF
06:10 – Writing and verify process
07:20 – Bench test after programming
09:00 – Final notes and tips
🔖 Tags
Audi A6 C4, MSA12, Immo OFF, 93C46, EEPROM, TL866, ECU, Immobilizer, ECU repair, EEPROM programming, Bosch MSA12, AT93C46, EEPROM dump, TL866 programmer, bench test, ECU cloning, IMMO delete, car electronics, automotive diagnostics, ECU tuning, chip tuning, ECU bench setup, Audi ECU, VW Audi Group
