Absolutely not! Vehicles owners and lessees are completely within their rights to use an independent repair facility for their vehicle’s maintenance and repair. The Federal Trade Commission (FTC), the nation’s consumer protection agency, states that it is illegal for a dealer to deny your warranty coverage simply because you had routine maintenance or repairs performed by someone else. Routine maintenance often includes oil changes, tire rotations, belt replacement, fluid checks and flushes, new brake pads, and inspections.