Autel MaxiIM IM608 new test report: successfully added a spare key to a 2018 Subaru WRX STI American model.
This is the original key, we need to add a new key to this system
in IM608, Select IMMO and auto scan VIN
Select Subaru Aisa-> Manual selection->America-> Impreza WRX -> 2015-2019->Smart key->Keyless System (CAN)->Immobilizer remote control learning->Key Learning
*If select Impreza WRX STi, it only has 2005-2014 blade key option. So we choose Impreza WRX instead.
Press OK, now you can see the 3 keys are registered
Turn off ignition with push buttoon ignition switch.
Successfully use the keys have been learnt to turn the ignition ON in 60 sec
The key must in the car and near to the Start button.
During the learning period, make sure all doors are in current position.
Wait until the learning process completed
Test the new key, it can start car, remote control works as well.