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Keys Replacement For Cars You can get an alternative key for a mechanical key in any hardware store. However, the key will need to be programmed by a locksmith or dealership. Smart keys are more complicated and require a trip to the dealer to connect them to your vehicle. These types of keys are usually expensive, but some car insurance companies cover the cost. Mechanical Keys You can still buy car keys that are only mechanical, like the ones you insert into an ignition lock cylinder and then turn to start your vehicle. If your car uses one of these, it's relatively inexpensive to replace the key and fob (if lost or stolen). A locksmith can create the basic key for you at a lower cost than what you would buy from a dealership. You can also ask a neighbor or a friend who knows how to program transponder keys for aftermarket use (which are cheaper than the factory keys) to make you a spare key and program it. It is essential to have a spare because modern cars won't start when a key that isn't programmed with the correct chip is used. Transponder keys resemble mechanical keys, but they have an electronic chip hidden inside the base. This chip is connected to the computer system in your vehicle. Your car will accept the code on the chip, but will not start if you choose another code. If the spare key you have has chips it must be programmed by a dealer. You'll need a specific machine to cut the key and program it. The machines are available at certain dealerships and it is unlikely that a locksmith would have the equipment necessary to create a key that has a transponder. Keys with remotes cost a lot to replace, particularly if you need an extra. If you have only the key shank missing, and a working replacement fob, you can try to reprogramme your fob by yourself. However, it can be time-consuming and complicated. If you've lost your entire fob and key however you should seek out a dealer as your best bet. There are other types of keys for cars that require a more specific set of skills to replace, like flip keys and smart keys. They're more complicated and require replacement by the dealer. Certain key fobs operate by proximity sensors or a door opener with a spring loaded mechanism. Transponder Keys If your car was built in the last 10 years or so it's likely to have a transponder key system. The keys contain a microchip in the key itself and the car's receiver that are both programmed to communicate with each other to start the car. Transponder keys can be a great way of deterring theft, as they require two components to start a car – the transmitter inside the key and the receiver that is connected to the immobilizer. Without both the key and the immobilizer system present the car will not start and it is not possible to connect hotwire. The key chips come with an individual serial number specific to your vehicle. When the key is inserted into the ignition, the serial number is sent to the immobilizer in the car and verified that it matches up, it will then allow the engine to start. The only thing that could stop this security feature is a device that can read the chip and match it with another vehicle. You'll need to find a locksmith that has the equipment to reprogram your key. Some car dealerships also offer this service, but their overheads make them more expensive than a locksmith who is independent. It can be difficult to obtain a new key with chip. The key has to be cut on a specific machine to ensure that it has the correct tracks in place that can then be used to program the key to your car. It requires specialized software, as well as the appropriate key cutter to do it properly. The majority of auto parts stores can copy some of the less complicated chips keys, however you must be aware of the serial number of the original key in order to ensure the correct information is encoded into the key. Many people make the mistake of visiting a dealer to have their chip key copied and end up paying more than they need to. Laser-Cut Keys Laser-cut keys are also known as a sidewinder key due to the distinctive winding cut on the key shank. G28 add an extra layer of security to your car. These keys are a great deterrent to auto theft because they require specialized equipment to duplicate. Like transponder keys, they have embedded chips that stop duplicate keys from opening your vehicle. They have a unique code that needs to be programmed into your vehicle to unlock it and start it. This additional level of security will guard your investment and stop thieves from trying to steal your vehicle for parts or to sell it. In terms of their design laser-cut keys are different from standard mechanical cut keys in that they have fewer carved-out grooves on the key. The shaft of the key is larger, which is a sign that this is not a regular car key. Locksmiths typically use a machine called a milling tool to cut these kinds of keys. This machine is similar to a drill bit and is designed to remove metal with precise angles. These are the safest keys you can buy for your vehicle. They're hard to duplicate and can only be done by cut by a certified locksmith or dealer. They're not like traditional keys. They're constructed from a tiny piece of steel which is shaped into a code and then cut with the laser in the factory. This kind of key is very robust and can endure a lot of wear and tear which makes it one of the best options for protecting your vehicle. The key can be folded in the fob, or it can be released by pressing the button. The keys are typically used in German cars, and provide an additional layer of protection against car thieves. The cylinder is resistant to breaking into, making it extremely difficult for a thief pick or pick-lock the car. Smart Keys Keys Smart keys communicate with the vehicle via radio-frequency identification (RFID) instead of the traditional single piece of carved metal. This means that they are equipped with a tiny chip that contains an encrypted code that is unique to each key. Whenever you unlock your car doors or pop the trunk, the key transmits a signal to your vehicle's computer onboard. The computer then triggers the right frequency and allows you to connect to your car and begin it. The chip of the smart key has several security features to protect it from theft. First, the key emits a low-frequency signal that isn't picked up by any receiver other than your car. If the computer onboard detects this signal, it will trigger a different one that is an individual sequence that only your vehicle will recognize. This prevents a tech savvy criminal from using a pulse generator in order to “fool the system” and make the key work on other vehicles. Some smart keys have specific features, like saving preferences for drivers, opening windows remotely or the sunroof from afar and many more. These features can be accessed by activating the proximity sensor on the key fob by pressing a button or, in some instances it is as simple as twisting a tiny piece of metal inside the key. Most of these key fobs feature buttons that open the doors for themselves However, some key fobs have an additional method to open them: a slot or holding the dead key close to a spot on the dashboard, where it houses an inductive coil that is able to transfer energy. Some even have an emergency (fully mechanical) key blade that is hidden inside the key to enable this. Replace a smart key requires an appointment with a dealer, where they can order the replacement or stock it. They'll also have to program the new key to recognize your vehicle. You can also go to an locksmith to get your replacement key fob to be programmed and replaced. A locksmith may charge more than a dealer, but they'll be able to finish the job more quickly and at a lower cost.