What the Federal Emissions Warranty Actually Covers

Short answer Federal rule 40 CFR 85.2103 makes the manufacturer repair certain emissions parts at no cost for 8 years or 80,000 miles , whichever comes first. Most guides name three covered parts. The current rule names five groups . One of them is the battery in an electric or plug-in hybrid car. The clock starts the day the car was first sold. Not the day you bought it. Jump to what you need What is covered The two warranties If you bought it used Electric and plug-in Who to call Rule current as of 2026-06-30 Checked 2026-07-27 Source eCFR Search for the federal emissions warranty and you get the same three parts every time. Catalytic converter, electronic control unit, on-board diagnostic device. That list is old. It appears on EPA's own consumer FAQ page, which says those three are the only ones. The page was updated in June 2026, but the component list it points to is a fact sheet from October 2015. The rule changed. Title 40 was amended in April...