If your car is equipped with integrated programming, you can program a new transponder key or a remote control for keyless entry yourself. If you have a new vehicle, it's most likely not equipped with integrated programming and you'll need a professional key programmer. Yes, it is possible to take a car key that has already been programmed and reset it to work with another vehicle. However, there are limitations you'll find with certain brands and models. It all comes down mainly to the way the electronics of the key are designed.
You can replace a keychain using the “do it yourself” method. You can purchase a new keychain from a local dealer or an auto parts store. Then, you can use the universal keychain programming method to program the remote control, and that's it. There are many companies that offer professional automotive key programming services, such as dealers, auto repair shops, and locksmiths. You can buy them at your car dealership (the most expensive option), at an auto parts repair store, or save money and buy a keychain online.
Of course, there are exceptions to this general trend, so check with your local locksmith before reprogramming your transponder or car key fob. Sometimes, the bow has a built-in remote control for the car key, while others have a plastic cover (most of the time black).Therefore, these covers are the best visible indicator that you will need to program the transponder key if you are going to replace this type of key. The most important thing when reprogramming the key rings of a car is that the remote control corresponds to your make, model and year. However, you can also choose an intermediate option: buying a keychain and then paying a professional to program it for you.
And, as a general rule, the transponder keys must be cut to fit the ignition before they can be programmed. Some older vehicle models have control instructions that self-program, while most newer vehicles require a professional to program their vehicle. For example, look at the difference between reprogramming your car keys and programming and replacing your car's remote controls. But as an argument, let's say you have a transponder key that was programmed without cutting it (which is possible, although unlikely). For the best results when reprogramming your car keys, do yourself a favor and contact a locksmith. As long as the electronics work, you can reprogram the car's key rings that are already programmed.
A locksmith offers replacement parts, programming services and the peace of mind that everything will work. So that you don't have to worry about programming the keychain yourself or paying someone to do it, the best option is to go to a car dealership.