What is a common misunderstanding about emissions testing?

The notion that only newer vehicles are required to pass emissions testing is a common misunderstanding. In reality, emissions testing regulations often apply to a broad range of vehicle ages, not just newer models. Many states have specific requirements that may include older vehicles depending on the emissions standards in place, which can vary based on the vehicle's age, type, and local regulations.

While newer vehicles may meet certain standards more easily due to advanced technology and design, older vehicles can still be subject to emissions testing. This ensures that all vehicles on the road are contributing to reducing pollution and protecting air quality, regardless of when they were manufactured. Emissions tests are designed to help identify and mitigate emissions that may be harmful to the environment, and thus, various classes of vehicles, including older ones, may still need to comply with applicable emissions standards.

The other options present alternative misunderstandings about emissions testing but do not reflect the accurate scope and regulatory framework that encompasses vehicle emissions.