Just programmed a smart key on a Audi A5 5th generation immobilizer using Lonsdor K518ISE key programmer via OBD successfully. Not all keys lost, working key is required. Connect Lonsdor K518 host with vehicle via ODB diagnostic socket Select Immobilizer->AUDI->5th IMMO->Immobilizer smart key Backup immo eeprom data before programming Turn ignition switch on Reading eeprom data and save…