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You can purchase a replacement key for a mechanical one at any hardware shop. However, the key will need to be programmed by a locksmith or dealership.

Smart keys are more complex and require a visit to the dealer to connect them to your car. These types of keys are usually expensive however some insurance companies will cover the cost for car key replacement.

Mechanical Keys

You can still purchase car keys that are solely mechanical, like the ones you place in an ignition lock cylinder, and turn to start your car. If your car has one of these, replacing the fob and keys is fairly inexpensive (if they are lost or stolen).

A locksmith can make the basic key for you at a lower cost than what you'd buy from the dealership. You can also have a friend or neighbor that is proficient in programming transponder keys that are made for the aftermarket (which are less expensive than factory keys) cut keys for you and program them. A spare key is crucial because modern cars won't start when a key that isn't programmed with the correct chip is used.

Transponder keys appear like mechanical keys, but they are actually equipped with an electronic chip inside the base of their plastic shape that communicates with the computer system in your vehicle. Your vehicle will recognize the code in the chip and accept it, but it will not start if a different code is used.

If your spare key contains a chip that is programmed, it will have to be programmed by a dealer. You'll need an equipment that can cut the key and then program it. These machines are only available at certain dealerships, and it's not likely that a locksmith has the equipment required to create an engraved key using a laser transponder.

It's expensive to replace keys using remotes, especially if require an extra. If you only have the shank of your key missing and a functioning replacement fob you can attempt to reprogramme your fob by yourself. However, it could be time-consuming and challenging. You're better off contacting a dealer if you've lost both the fob and the key.

Other types of keys for cars require more special skills to replace. They include flip keys as well as smart keys. They are more complicated and usually have to be replaced at the dealership. Some key fobs have an electronic key that folds into the enclosure and opens doors or is operated by the use of a proximity sensor to open and start your vehicle.

Transponder Keys

If your car was constructed in the past 10 years or so, it's likely to have a transponder key system. These keys have a microchip in the key itself and a receiver in your car that both have been programmed to communicate with each other to start the vehicle.

Transponder keys can be a great way of deterring theft since they require two parts to start the car - the transmitter in the key and the receiver attached to the immobilizer. The car will not start without the key and the immobilizer system.

These key chips have an individual serial number specific to your vehicle. The serial number of the key is then sent to the immobilizer of the car and verified to be in line. If it does the engine starts, it will. This security feature is only overcome by a specific device which can read the chip and match it to another vehicle.

You'll require an locksmith with the equipment needed to reprogram your key. Some car dealerships provide this service, however their overheads make them more expensive than an independent locksmith.

Finding a new car key with a chip inside it can be a very complicated process. To program your car key fobs replacement, the key has to be programmed on a special machine. It requires specialized software, and the correct key cutter to do it properly.

Most auto parts stores can duplicate some of the more basic chips keys, but you'll need to know the serial number of the original key to ensure that the correct information is incorporated into the key. Many people make the error of visiting their dealer to have their chip key copied, and end in paying more than they need to.

Laser-Cut Keys

Laser-cut keys, also referred to as sidewinder keys due to their distinctive winding cuts in the key shank, add an extra layer of security to your vehicle. Because it requires specialized equipment to duplicate these keys, they're a great security measure against auto theft.

Like transponder keys, they feature built-in chips that prevent unauthorized key copies from opening your car. They have a unique number that needs to be programmed into your car to unlock it and begin it. This additional level of security is a fantastic way to protect your investment and deter thieves who could be trying to steal your car for parts or sell it.

In terms of design, laser-cut keys are slightly different from standard mechanical cut keys, as they have fewer carved-out grooves on the key. The key shaft is also more substantial, which is another sign that this is not a standard car key. Locksmiths typically make use of milling tool to cut these types of keys. This tool is similar to a drill bit and is designed to remove metal in very precise angles.

These are the most secure keys that you can purchase for your vehicle. They're hard to duplicate and must by cut by a certified locksmith or dealer. They're not made with traditional keys. Instead, they are constructed from a small piece of steel that's shaped according to a code at the factory before being cut with a laser. This type of key is extremely robust and can be able to withstand the rigors of wear and tear which makes it one of the best options to protect your vehicle.

The key can be folded up into the fob, or pop out by pressing a button. These kinds of keys are commonly used in German cars and offer an additional layer of security against car thieves. The cylinder is resistant to breaking into, which makes it difficult for thieves to pick or pick-lock the vehicle.

Smart Keys Keys

Smart keys communicate with the vehicle using radio-frequency identification (RFID) instead of the conventional single piece of carved metal. They are equipped with a chip that has an individual code, which is encoded on every key. The key sends a signal to the onboard computer in your vehicle every time you open the doors or open the trunk. The computer then prompts the appropriate frequency, allowing you to access your car and begin it.

The chip in the smart key comes with a variety of security features to protect it from theft. First the key emits a low-frequency signal that isn't picked up by any receiver but your car. If the onboard computer detects this signal, it will trigger an alternative one that's an exclusive sequence that only your car can comprehend. This will stop a criminal with a high-tech background from using an external generator to "fool" the system and perform the work for other vehicles.

Certain smart keys come with specific features, like the ability to store preferences for drivers, opening windows remotely or the sunroof remotely and many other. These are accomplished by activating the key fob's proximity sensor by pressing a button on the key itself or, in some instances, by twisting a tiny metal component inside the key.

Certain key fobs can be opened by placing 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 concealed in the key to activate this.

Replacing a smart lock typically requires a visit to the dealership, where they will either have the replacement key fobs for cars in stock or purchase it for you. They'll also need to program the new key to recognize the car key replacement you are driving. You can also go to a locksmith for your replacement key fob to be programmed and then replaced. Locksmiths may charge more than the dealer, but they'll likely be able to finish the job quicker and at a lower cost of car key replacement.