Is the mechanic entitled to claim wages for his time and effort if he was unable to fix the car's malfunction?

The taxi mechanic is not entitled to payment except in the event that he performs the agreed-upon work, which is repairing the specified defect. This is because if the hiring (ijarah (definition)) is stipulated by work, then the worker is not entitled to payment unless he performs the work. If it is stipulated by time, then he is not entitled to payment unless the time has elapsed. Otherwise, he is entitled to payment commensurate with the work he has done.