Reliability analysis of the brake system of a forklift automobile inspired by the forklift of Bouygues Construction Company was conducted in this study. The operations of a braking system in the automobile process and the reasons for failure in the brake’s system operation were investigated; the various causes of failure in a brake system such as oil in the friction plate, failure of the caliper piston to home, lack of braking action and failure of the oil valve were examined for failure that can lead to its maintenance and improvement in its performance. The reliability results of a brake system to improve the performance of the forklift automobile were articulated and a flowchart of brake system replacement model was constructed. The descriptive statistics of the reliability indices was employed in the analysis and the mean mile to failures and availability indices were determined. Reliability analysis of the brake system of the forklift was conducted using exponential reliability model and broad-based results revealed that the brake system was established according to the structure and failure reason of brake system of the forklift automobile. Weibull distribution parameters of failure reasons of brake system were estimated using the maximum-likelihood estimation method. Reliability analysis of brake system which was carried out based on real-time value, parameter estimation such as failure rate, reliability, unreliability, availability and maintainability. The reliability of brake system is progressive between 2014 and 2017. Conclusions and recommendations were made to improve the performance of the forklift automobile as the failure causes probability of brake system was different under different reliability.