Why are multiple warranty periods listed?

Depending on what is being repaired, the length of a factory warranty varies. Often a comprehensive “bumper-to-bumper” warranty covers everything outside of schedule maintenance. This is generally the shortest warranty period. Usually a longer powertrain warranty covers engine and transmission defects. Anti-corrosion protection often lasts even longer. Finally, some manufacturers offer roadside assistance for a limited time. Check your vehicles maintenance guide to determine your vehicles needs.