Many of the newer cars built have transponder type systems for locking and unlocking the doors and for controlling other features of the car. You can also get duplicate sets for these types of keys although they may cost you more than the normal kind.
When it comes to transponder keys, some things need to be done to ensure that the extra keys will work with the car. The key has to be made and cut in the same way as the original and then the transponder programmed to the exact radio frequency of your car’s system for it to be able to work with the car as the original key does.
You can also look for Car Key Locksmith in Philadelphia if you are a resident of Philadelphia and if you also want car replacement services.
You may choose to reprogram the key yourself if you have the right equipment and knowledge or you can have a professional do it for you.
If you choose to do it yourself you may save yourself a lot of money but the whole process is time-consuming and if you do it wrong the keys won’t work. Going to a professional will save you a lot of time but you will also have to pay for the services rendered which can be quite costly.
Depending on the type of car you have it would be better to go to your dealer to have the copies made. This is the best way to avoid voiding the warranty and you are sure that the job will get done well.