I bought the Car Keys Express EZ Installer to program a second key for my 2015 Mazda 3, and it was a complete disaster. Neither the new key nor my original key worked properly after using it, and the device even caused issues with my car’s computer. To make matters worse, customer service refused to help and hung up on me when I called for support. I had to hire a locksmith to fix the damage. This product is unsafe, unreliable, and the company does not support their customers. Avoid it at all costs.

Works great with fairly easy to follow instructions. The only con I have is the fact that it only works for one car. Once used it can only be used on that vehicle.

Well, I gave a glowing review for using this for adding a key fob for my son's F-150. It couldn't have worked better. However, we bought another one to add a key for my daughter's CX-5. It worked in the sense that it was able to add a new OEM key fob. However, it left her car with the red key warning light illuminated. We have found no way to turn this light off. So it you have a Mazda you probably need a different option.

We needed another smart key for my son's 2015 F-150. Dad (me) drove off not realizing his own keys were on the hood of the truck and they fell off somewhere. This left us with only one key fob. I ordered another OEM key fob and this universal installer. It worked perfectly and within just 5 minutes we had another working key fob. The only hiccup was going through the instructions with the app it first though we had a truck with a key start (flip key) even though we chose smart key on each menu. We just started over in the app with chosing the smart key and it worked perfectly. Saved us a trip to the stealership or auto locksmith. Please note that if you already have two working key fobs, you can easily program another key without needing this installer. With only one working key fob this device was very helpful.