Some dealers specialize in selling accident-damaged vehicles. The dealer will run a CarFax on an obviously damaged vehicle. If it is clean, they will buy it, because they know they can show consumers the clean CarFax to “prove” it has never been in an accident. CarFax Vehicle History Reports don't always show the whole story. CarFax can only report history that has been reported to it. If a vehicle is repaired at an auto repair shop that does not report to CarFax, the accident will not be shown on the CarFax. If you suspect that your vehicle has been in an accident, we will run a battery of vehicle history reports, including CarFax, Autocheck, and National Motor Vehicle Title Information System (NMVTIS) reports.