There are a few different ways that you can tell if a vehicle has been in an accident. The first way is to look for physical damage on the outside of the vehicle. If there are any dents, scratches, or other signs of damage, it is likely that the vehicle was in an accident. Another way to tell if a vehicle has been in an accident is to check the CarFax report. The CarFax report will show any accidents that have been reported on the vehicle. Finally, you can ask the previous owner if they know whether or not the car has been in an accident.