Warranty covers defects in materials and workmanship for a set period of time or mileage from the date of purchase. The manufacturer will fix or replace defective parts under warranty at no cost to the owner. Maintenance refers to regular inspections and services needed to keep the vehicle running properly, like fluid changes and component replacements. While some manufacturers provide limited free maintenance, warranty and maintenance are separate - warranty protects against manufacturer defects, while proper maintenance keeps the vehicle performing as intended over its lifespan.