What are the two primary components checked during a Pennsylvania State Auto Inspection?

The correct focus during a Pennsylvania State Auto Inspection is on the safety and emissions systems. This is because the primary goal of the inspection is to ensure that vehicles are operating safely on the roads and that they comply with environmental regulations related to emissions.

Safety components include essential features such as brakes, lights, steering, and suspension, all of which contribute to the safe operation of a vehicle. Emissions systems are checked to make sure that the vehicle meets the state's standards for air quality and environmentally-friendly operation. This is critical not only for complying with state regulations but also for helping to reduce pollution.

Other options, while they may contain elements important for vehicle performance, do not reflect the primary components that are mandated for inspection under Pennsylvania law. For example, while engine performance and tire conditions are crucial for the operation of a vehicle, they are more secondary aspects compared to the direct safety and emissions criteria set forth in the inspection requirements. Similarly, focusing on interior and exterior aesthetic features is not relevant to the inspection process, as it does not contribute to the vehicle's safety or environmental standards.