Problem:
Added keyless entry to an 2023 Audi A3 8Y MQB49 5D system using Keydiy KD-X4 and now the keyless entry no longer works (locking and starting work). When I pull the handle, the LED on the key flashes, but the car doesn’t unlock. Any solution?
Solution:
Audi A3 5D uses a UWB key that’s why proximity in handles doesn’t work; you must use original uwb key.
1 uwb key + 1 non-uwb key = no UWB function.
Keydiy FGB08 comes with the 5D basic program. It does not currently support vehicles with UWB functionality.
It only supports the 5D program for all vehicle models.
Customer solution:
It happened to us on VW Polo 5C key , than we added the KD key first and the original key as second and it helped, the Keyless entry and start was working as it should.
It is worth a try.
