What components are inspected for the exhaust emissions system?

The correct answer focuses specifically on components directly related to the exhaust emissions system, which are crucial for ensuring that a vehicle meets environmental standards for emissions. The air injection system helps to introduce additional air into the exhaust stream, promoting more complete combustion and reducing harmful emissions. The thermosatic air cleaner regulates the intake of air based on temperature, ensuring that optimal conditions for combustion are maintained, which also contributes to cleaner exhaust emissions. Lastly, the catalytic converter is a key component that converts harmful exhaust gases into less harmful substances before they are released into the atmosphere. Together, these components play a significant role in reducing the level of pollutants emitted by vehicles, making their inspection vital for compliance with environmental regulations.

The other options mention components that do not pertain to the exhaust emissions system. For example, while the wiper system and brake lines are critical for vehicle safety, they do not impact the vehicle’s emissions. Similarly, the exhaust recirculation system might seem relevant but does not include components like the air injection system or catalytic converter. Components such as power steering, suspension, and belts and hoses relate to vehicle operation and safety rather than emissions and environmental impact.