This research focuses on a bus industry in the State of Mexico, sustainability is essential to preserve our planet; a Circular economy is a transformative economy proposal that conserves and improves natural capital, optimizes the use of resources, and minimizes the risks of the system by managing a finite amount of existence and renewable flows. Currently, the population is suffering the aftermath of COVID-19, such as lung scars, chronic inflammatory processes, and a decrease in the level of oxygen saturation in the blood until; now it continues to evolve in different strains. The objective of this research is to develop a post-COVID-19 environmental strategy based on the circular economy considering sustainable plastic manufacturing in the auto parts sector to include bioplastics as raw material in the bus industry in the State of Mexico. To achieve this objective, it was carried out in 2 phases: situational analysis and determination-deployment of the strategy. The method used in research is deductive and applicative research. The main finding is identifying sustainable plastic materials such as bio-based PET (Polyethylene Terephthalate), soy foams, natural fibers such as rice husks, and coconut reinforcement used for molding plastic parts. In conclusion, the strategy presents the value that sustainability has for the market and customers, the environmental benefits of bioplastics, and a potential decrease in the cost of manufacturing auto parts, granting a greater appreciation of the brand image and the industry's environmental responsibility.