A Car Seat Replacement Key is a Costly and Time Consuming Process
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Lost or Stolen keys
A key replacement is a time-consuming and expensive process. You may also have to pay for a tow or to have your car's chip re-paired.
One way to save time and money is to ensure that you don't lose your keys in the first place. Consider adding a brightly-colored or reflective keychain or painting the bow in a hue that is distinctive. Keep a spare keys for your seat in a safe spot, just to be sure.
If you do locate your key lost, try to identify it by looking at the code that is stamped on the bow of the key. This information will allow you to determine if it is the right key for your particular seat.
Transponder Chip Keys

The transponder key, also referred to as a chip key or key FOB (fob that controls your key), is one of the most popular kinds of keys for cars. They've been around for over 20 years and are designed to ward off theft by sending a coded message once inserted into your car's ignition.
A transponder is actually a microchip that is embedded inside the plastic cover of your car key. When the key is placed into a key FOB or the ignition of an automobile, it sends an extremely low-level radio signal (ECU) to the vehicle. The ECU detects the unique digital serial number of the chip and responds accordingly - if the signal matches, the engine will start.
Transponder chips may not be 100% secure, but they are a great way of reducing auto thefts. The idea behind these types of keys for cars dates back to World War 2 military planes that used codes to differentiate them from aircrafts that were pursuing.
A locksmith can create an identical transponder for you in case you're locked out and require a replacement. This is a little more complicated than simply rekeying your standard key, however, because the chip inside your new key must match up with the car's transponder system. Therefore, purchasing an additional transponder from a dealer will typically be more expensive.
Laser Cut Keys Keys
In contrast to the conventional mechanical cut keys that only allow the key to be turned in only one direction, laser cut car keys have grooves cut out on both sides. They are more difficult to duplicate and are only used in the lock or ignition from either side. They are also referred to as sidewinder or transponder keys. They provide more security in the event of theft and are an upgrade from the original chip key/transponder key.
To create a laser key the locksmith first needs to recognize the cuts from the key fob that is already in place in order to determine the type of blank that should be used. Then, he must set up the key cutting machine to cut the key in accordance with the original cuts. This requires a key cutting machine that is more advanced than the wheel-based duplicaters available in hardware stores.
While seat key fob cost more than a regular key they provide additional security for your vehicle. This is because a laser key cannot be duplicated by the same machines used to make regular edge-cut keys. This prevents the practice of "key-jumping," where a car key is programmed for different vehicles and allows it to unlock the door or start the engine. These keys must be recovered by a professional locksmith or dealer.