The first line of defense against rats is maintaining a clean car interior. Regularly vacuum and remove any food crumbs or debris that might attract rodents. Pay special attention to the trunk and storage areas, as rats are drawn to hidden spaces where they can build nests. Explore commercial rat repellent products designed specifically for cars. No entry Rat Repellent Sprays are available in the market, and when used as directed, they can create a protective barrier that deters rats from approaching your vehicle. Ensure you follow the product's instructions for application and reapplication.Conduct a thorough inspection of your vehicle and seal any potential entry points. Rats can squeeze through surprisingly small openings, so pay attention to gaps around doors, windows, and the engine compartment.