What is Transponder Key?

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Most of today's vehicles come with highly advanced key styles then you may be used to. Top manufacturers like Ford, Chrysler, Chevrolet and BMW are now all using some type of transponder key. If you are still used to the more traditional version of a car key you may be interested to know just what the difference between a transponder key and a regular key might be.

What does a transponder key have that a regular key does not?

What is Transponder Key? Transponder keys have an RF transmitter placed directly inside them. As a result a device inside the ignition switch of a vehicle needs to receive a signal from the transmitter to actually start the car. This offers an extra level of security that makes the vehicle much more difficult to steal. The vehicle will only start when it receives a low level signal from the key and this means that every key is not only unique in its configuration for the ignition switch but unique in its transponder signal as well.

The main reason for using these keys:

One of the main reasons that manufacturers utilize transponder keys today is to prevent a car from being hotwired. The car won't actually start without a device transmitting a low level signal or without a key placed into the ignition. Even if a copy keys used without the proper transponder signal the car won't start at all. If someone were to take up the ignition and try and hotwire the car the car also won't start because it's not receiving a signal from the transponder.

In most cases if you wanted to tell if you had a transponder key it's important to note that the plastic part on the key is generally much thicker than a traditional key. If you wanted to confirm you could wrap several layers of tinfoil and tape around the bulk end of your car key to block the transponder from giving off a signal. If your car doesn't start when you place the key in the ignition there's a very good chance that you have a transponder key.

Click here to find out what type of key your vehicle adopt: transpondery

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