Vehicle Warranties and Recalls
Federally required emission control warranties protect you, the vehicle owner, from the cost of repairs for certain emission related failures that result from manufacturer defects in materials and workmanship or that cause your vehicle to exceed federal emission standards. Manufacturers have been required by federal law to provide emission control warranties for vehicles since 1972. EPA has developed two fact sheets that discusses the federal emissions warranities;
Emission Warranty Information: If your car just failed an emissions test....
For information regarding vehicle emission recalls see OMS's In-Use Vehicle Emission Testing & Recall.