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 RepairSmith work on engines and transmissions? Does RepairSmith charge for a diagnosis? Does RepairSmith do body work? Can I provide my own parts for a labor-only repair? When will I pay for the repair?