Is the diagnostic fee applied to the repair? November 01, 2022 19:15 Updated No, the diagnostic fee is not applied to the repair. The diagnostic fee covers one hour of troubleshooting a specific issue. Related articles Does AutoNation Mobile Service work on engines and transmissions? How does a diagnosis work? Does AutoNation Mobile Service do body work? Does AutoNation Mobile Service offer a warranty? What types of vehicles does AutoNation Mobile Service work on?