This paper demonstrates the fault tolerance performance of the A-source inverter fed PMSM drive system for electric vehicles. The proposed topology of the A-source impedance network is implemented to obtain high gain dc output for the inverter module. This high magnitude dc output is fed to the PMSM drive system for electric vehicle applications. In addition to the design strategies of the proposed system, this paper presents a fast fault identification and diagnosis strategy under switch faults occurring in the inverter module. The utilized method is robust to common converter issues such as load variations and input power fluctuations. The simulation results of the proposed fault-tolerant operation have been presented in this paper. This efficient fault-tolerant operation substantially improved the reliability of the overall system. The achieved results demonstrate the effectiveness of the proposed system with fault-tolerant capability for electric vehicle applications.