Which is the federally mandated warranty period for catalytic converters?

The federally mandated warranty period for catalytic converters is indeed 8 years or 80,000 miles. This regulation is established to ensure that vehicle manufacturers are held accountable for the emissions-related parts of their vehicles, including catalytic converters, which are essential for reducing harmful emissions.

This warranty requirement is part of the Clean Air Act amendments that were instituted to help protect the environment by ensuring that vehicles remain compliant with emissions standards for an extended period of time after purchase. As catalytic converters are crucial for controlling exhaust emissions, the longer warranty period reflects the importance of maintaining their functionality over a significant duration of vehicle use.

In contrast, the other options either represent shorter or incorrect warranty periods that do not comply with federal regulations regarding emissions-related components. They do not address the longevity and potential wear and tear that would affect the catalytic converter during regular use of the vehicle.