You are able to program a 2013 Ford Flex remote head key by yourself if you have two working keys (or keys that start the vehicle). The new remote head key will first need to be cut to match your original at an automotive locksmith or the dealership. Once the remote head key is cut, you can use the printed programming instructions that we send to make the remote key work for your 2013 Ford Flex The instructions are very easy to understand and can be performed in less than a minute. If you only have one working remote head key or you’ve lost all working key for this vehicle, the programming can only be done at an automotive locksmith or dealership. This remote head key comes with a new battery installed and is tested for functionality before sending. This Remote head key comes with 4 buttons and if you look on the back of the unit, you may see some of these numbers: CWTWB1U793 - 1788A-FWB1U793 - 315 Mhz . Use these numbers to confirm that your Remote head key will match this product and that it will work for your vehicle.