Chip

The transponder chip in a coded key.

In the context of auto locksmithing, a chip typically refers to a transponder chip embedded in modern car keys. The transponder chip is a small electronic component that communicates with the vehicle's immobilizer system to prevent theft. When you insert a key with a transponder chip into the ignition or near the start button, the chip sends a signal to the car’s computer, verifying that it is the correct key before allowing the car to start.

The transponder chip is essentially a tiny microchip that's programmed with a unique code. This code is sent wirelessly to the vehicle’s immobilizer system, which checks the code against its own database. If the code matches, the system allows the engine to start; if it doesn’t, the vehicle won’t start. This is a key security feature in modern vehicles, designed to prevent unauthorized starting and reduce the risk of car theft.

While the chip itself doesn't have any physical interaction with the lock or ignition (that’s the blade’s job), it is an integral part of the key's functionality, especially when it comes to starting the vehicle. Even if someone has a duplicate key that fits the lock, without the matching transponder chip, the car will not start.

For auto locksmiths, dealing with transponder chips involves not only cutting a new key blade but also programming the chip to ensure it communicates correctly with the car’s system. This process requires specialized equipment and knowledge, as not all locksmiths have the tools needed to program or clone transponder keys.