Whats a re-flash? A lot of owners are unaware that their vehicle will require a re flash when they've lost all their keys. A re-flash is when a tech goes into the vehicle, removes the ECU and "re-flashes" it back to its original factory settings.
This happens on a few older model vehicles. Mainly Toyota and Lexus. It is the only way to program new keys. Unlike newer model cars where the tech is able to connect the obd port. These vehicles are more labor intensive,and require more time to complete.
Vehicles that require a reflash