A Car Seat Replacement Key is a Costly and Time Consuming Process
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Keys lost or stolen
The replacement of a key is a costly and time consuming process. You might also have to pay for a tow as well as to have your car's chip re-paired.
One method to save time and money is to prevent losing your keys in the first place. Consider using a brightly colored reflective piece of your keychain or painting the bow of your keys a hue that is noticeable. Keep a spare keys for your seat in a safe location, just to make certain.
If you find your key missing attempt to identify it by looking at the code that is stamped on the bow of the key. This will help you determine if the key is the appropriate key for your seat.
Transponder Chip Keys
Transponder keys, also referred to as key FOBs or chip keys (fobs that control your key), are one of the most widely used types of car key. They've been in use for more than 20 years and are designed to prevent theft by sending a coded signal when put into the ignition of your car.
A transponder is actually a microchip that's embedded within the plastic cover of your car key. When a key is placed into a key FOB or the ignition of the car, it transmits an extremely low-level radio signal (ECU) to the vehicle. The ECU recognizes a specific digital serial number on the chip, and responds accordingly. If the signal is in line, then the engine will start.

Although transponder chips aren't foolproof, they're a great way to reduce auto thefts. The idea behind these kinds of keys for cars is actually quite old-fashioned that dates to World War 2 era military planes that used coded messages to differentiate them from enemy planes.
The Keylab can create a duplicate transponder in case you're locked out and require a replacement. This process is more complex than rekeying your regular key since the chip inside the new key needs to match the car's receiver system. Therefore, purchasing a duplicate transponder key from a dealer will typically be more expensive.
Keys Laser Cut Keys Keys
Unlike the standard mechanical cut keys that only allow the key to be turned in one direction the laser cut keys have grooves carved out on both sides. They are more difficult to duplicate and can only be used in the ignition or lock from either side. Also known as sidewinder keys, they are a step up from the basic transponder key/chip key and offer greater security in the event of theft.
To make a Laser Key the locksmith must first be able to decode the cuts from the key fob they have in order to determine the type of blank that needs to be used. The locksmith must then set up the machine that cuts keys to cut the key in accordance with the original cuts. This requires the use of a key-cutting machine that is more advanced than the wheel-based duplicaters available in hardware stores.
These keys are more expensive, but they provide greater security for your vehicle. Laser keys are not duplicated with the same machines that produce a traditional edge-cut keys. This helps to prevent the practice of "key jumping," where a key is programmed to work with different vehicles and permits it to turn the lock and even start the engine. The keys can only be retrieved by an expert locksmith or a dealership.