Keys Replacement For Cars
You can purchase the replacement key for a mechanical key at any hardware store. This key will need to be programmed by a locksmith or a dealer.
Smart keys are more complex and require a visit from the dealer for the keys to be paired with your car. They can be expensive, but many car insurance companies will cover the cost.
Mechanical Keys
You can still buy mechanical keys for your car which you put into the ignition lock cylinder to start your car. If your car uses one of these, it's inexpensive to replace the key and fob (if lost or stolen).
A locksmith can design new keys at a lower cost than what you buy from a dealer. You can also ask a neighbour or friend who is able to program transponder keys (which are cheaper than the factory keys) to cut you a spare and program it. It is important to have a spare key as modern vehicles won't start in the event that the key does have the right chip.
Transponder keys look a lot like mechanical keys, however they contain a hidden electronic chip in the base of their plastic design that communicates with your vehicle's computer system. Your vehicle will recognize the code contained in the chip and accept it, however it will refuse to start if any other code is used.
If the spare key you have has a chip it must be programmed at a dealership. The dealership will require a special machine for both cutting and programming the key. These machines are available only at specific dealerships, and it is unlikely that a locksmith will have the equipment needed to create a key with a transponder.
Keys with remotes can be costly to replace, especially when you require an extra. If you only have the key shank missing, and a working replacement fob, you can attempt to reprogramme your fob on your own. However, it can be time-consuming and complicated. If you've lost the entire fob and the key, however you should seek out a dealer as the best option.
There are other kinds of keys for cars that require a specialized set of skills to replace, like flip keys and smart keys. These are more complicated and need to be replaced by the dealer. Some key fobs feature a spring-loaded key that folds into the enclosure and opens doors or uses the use of a proximity sensor to open and start your car.
Transponder Keys

If your car was built in the last 10 years or so it's likely to have transponder keys. The keys are equipped with an embedded microchip and an electronic receiver that is programmed to send a signal to start your vehicle.
Transponder keys are a great way to stop theft because they require two components for the car to start that is the transmitter (transponder) inside the key and the receiver connected to your immobilizer system. Without both the key and the immobilizer device in place, the car won't start and it will be impossible to hotwire.
These key chips are programmed with a serial number that is unique to your vehicle. The serial number of the key is transmitted to the immobilizer of the car, and then checked to be in line. If it does, the engine will start. This security feature can only be defeated by a special device which can read the chip and match it with a different car.
You'll need to find an locksmith with the equipment to reprogram your key. Some car dealerships offer this service, however they tend to be more expensive than an independent locksmith because of their overhead.
It can be difficult to obtain an entirely new key that has chip. To program your car, the key needs to be programmed using a specific machine. This requires specialized software and the right key cutter to be done correctly.
The majority of auto parts stores can copy some of the less complicated chips keys, however you must know the serial number of the original key to ensure the correct information is encoded into the key. Many people make the mistake of visiting a dealer to get a chip key copied, and end in paying more than they should.
Laser-Cut Keys
Laser-cut keys are also referred to as a sidewinder keys due to the distinctive winding cut that is made on the key shank. They add an additional layer of security to your vehicle. Because it requires specialized equipment to duplicate these keys, they're a great protection against auto theft.
Like transponder keys, they feature built-in chips that prevent unauthorised copies of keys from getting into your vehicle. They have a unique code that must be programmed to your car to unlock it and start it. This additional level of security will guard your investment and prevent thieves from attempting to steal your car for parts or to resell it.
Laser-cut keys differ from mechanically-cut keys in terms of design. They have fewer grooves that are carved on the key. They also have a larger key shaft which is an excellent indication that it's not your regular car key. Locksmiths typically employ a machine known as milling tool to cut these types of keys. This tool is similar to a drill bit, and it's designed to remove metal at precise angles.
These are among the most secure keys you can buy for your vehicle, since they're extremely difficult to duplicate and only cut by the locksmith who is a certified dealer. They're not made with traditional keys. Instead, they're made of a tiny piece of steel that is cut to form a code in the factory before being cut using a laser. This type of key can be able to withstand a great deal of wear and tear and is among the best choices for protecting your vehicle.
Depending on the key, it will fold into the fob, or pop out at the touch of a button. Keys like these are commonly used in German automobiles, and offer an extra layer of security against car thieves. The cylinder is also very resistant to breaking into, making it extremely difficult for a thief pick or pick-lock a vehicle.
Smart Keys Keys
Contrary to the conventional single piece of carved metal smart keys use radio-frequency identification, or RFID to connect with the car. They come with a chip with a unique code, which is encoded on each key. The key sends a message to the onboard computer of your vehicle whenever you unlock the doors or open the trunk. The computer will then signal the appropriate frequency to allow you to start your car.
The chip of the smart key includes a variety of security features that protect against theft. First the key emits a very low-frequency signal that isn't received by any other receiver, not even your vehicle. If the computer onboard detects this signal it will send a different one which is a unique code that only your car is able to understand. This will stop a tech-savvy criminal from using a pulse generator in order to "fool the system" and perform the work on other vehicles.
In addition to locking and starting the car, certain smart keys also have additional functions such as storing specific preferences for drivers remote opening windows or the sunroof, among others. auto key replacement are accomplished by activating the key fob's proximity sensor, pressing a button on the key itself or, in certain instances, by twisting a tiny metal part inside the key.
Certain key fobs can be opened by holding the dead key in a slot, or by placing it in proximity to an inductive coil that is located on the dashboard. Some even come with an emergency (fully mechanical) key blade that is hidden inside the key to enable this.
Replacing a smart key typically requires a visit to the dealership, where they will either have the replacement on hand or order it for you. The dealer will also have to program your new key to identify your vehicle. You can also visit a locksmith for your replacement key fob to be programmed and then replaced. A locksmith might cost more than the dealer, but they'll likely be able to do the job faster and at a lower cost.