Audi A6 A7 A8 S8 (D5) 2017-2023 48V Alternator Control Board 4N1903028 new

New 48V alternator control board for mild hybrid Audi A8 S8 (D5) 4N1903028.

Click here if you are looking to repair your alternator by replacing the IGBT!

Common Issues:
Can't charge battery
Car cannot start
One or more IGBTs are fried


Info
Type: 48V Alternator control board
Model: -
Manufacturer: -
Brand: Audi
Manufacturer Part Number: -
Vehicle Part Number: 4N1903028
Compatible Vehicle Part Numbers: 4N0903028 (all versions)

Conditions
Hardware: 100% working, new
Comment: unit has been tested. You can also purchase the IGBT to do the repair yourself! 
Remember you may need coding (via ODIS) after installation on car.

Complete procedure:

1. Charge 12v battery
2. Turn ignition ON. Should get to 25% of battery charge
3. Code Alternator
4. Enter BMS and check live data. If battery is under 10% it needs charge. If is under 5% it will be software locked. If not, go to pairing and select protection OFF, then activate battery
5. Enter diagnosis on module 21 (Battery BMS), go to access permission and use login 20103 to activate. 48V high voltage system should be online now.
6. If you still can't charge battery with alternator, reset 12V system. Disconnect battery and use diagnosis to reset modules
Warranty: 6 months