Problem:
It’s a VW Polo MQB 49 5c from the end of 2018, only starting it works, but the remote does not work. The customer has already tried all of these, what could it be? He can no longer program the original key, but the remote does work, how is it possible that it no longer starts, only the Xhorse MQB and KD keys start without the remote?
Reason and Solution:
Key ID issue.
Because when you program a gecko online key MQB, it uses the key ID that is stored in the immo data, so you need to change the key ID with the original system and then it should work.
The clue is the two universal keys starting the vehicle. When adding keys you make the normal dealer key and save the key sync data as well, normally you have complete immo data from the cluster but mqb49 5c it’s from the original key so you have to make a normal dealer key as gecko online dealer key uses the original key ID.
Xhorse vvdi key tool plus has the function to modify original key ID.
Now when making normal dealer key on vag if the car is connected to Odis it will knock out the keys as it’s not a gecko online key.