How long are emission-related parts required to be covered by warranty under federal law?

Under federal law, emission-related parts are required to be covered by warranty for a minimum of two years of engine use. This requirement is part of the Environmental Protection Agency (EPA) regulations aimed at reducing air pollution and ensuring that new engines meet strict emission standards. The two-year warranty period serves to encourage manufacturers to provide reliable emission controls and to ensure that consumers have protection against defects in materials and workmanship that could affect the engine's emissions performance. This timeframe is considered adequate to enable consumers to address any potential issues related to emissions compliance early in the engine's lifespan, supporting both environmental objectives and consumer rights. Other options do not meet the federally mandated coverage duration, as they either fall short of the minimum requirements or extend beyond what is specified by law.