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Keys Replacement For Cars You can purchase a replacement key for a mechanical key at any hardware shop. The key needs to be programmed by a dealership or locksmith. Smart keys are more complex and require a trip to the dealer to pair them with your vehicle. These types of keys are typically expensive but some insurance companies will cover the cost. Mechanical Keys You can still purchase car keys that are solely mechanical, such as the ones you put into an ignition lock cylinder, and turn to start your car. If your vehicle is equipped with one of these, it's relatively cheap to replace the key and fob (if lost or stolen). A locksmith can cut an entry level key for you at a less cost than what you'd buy from a dealership. You could also have a friend or neighbor that is proficient in programming transponder keys from the aftermarket (which are cheaper than factory keys) cut you a spare key and have them programmed. Getting a spare is important because modern cars won't start when a key is not programmed with the proper chip is used. Transponder keys look like mechanical keys, however they are actually equipped with an electronic chip in the base of their plastic design that communicates with your car's computer system. The car will accept the code on the chip, but will not start if you try to use another code. If your spare key contains a chip it must be programmed at a dealership. The dealership will require an exclusive machine for cutting and programming the key. These machines are only available at specific dealerships, and it's not likely that a locksmith will have the equipment required to create keys that are laser-cut with a transponder. It is expensive to replace keys using remotes, particularly if you require a spare. You could try reprogramming your fob on your own if you're just missing the key shank and have a working replacement fob, but it can be time-consuming and laborious. It's better to go to an authorized dealer if you've lost both the key and the fob. There are other kinds of car keys that require a specialized set of skills to replace, such as flip keys and smart keys. They are more complicated and typically need to be replaced at the dealership. Key fobs can be operated by a proximity sensor or a door opener that is spring-loaded. Transponder Keys Transponder keys are most likely to be used in vehicles constructed in the last 10 years. These keys contain an embedded microchip and an electronic receiver that is programmed to communicate with start your vehicle. Transponder keys are a great way of deterring theft, as they require two components to start a car – the transmitter in the key and the receiver attached to the immobilizer. Without both the key and the immobilizer device present the car will not start and it will be impossible to connect hotwire. These key chips are programmed with a serial number that is unique to your vehicle. When the key is inserted into your ignition, the serial number is sent to the cars immobilizer and checked to ensure that it is compatible and allows the engine to start. This security feature can only be overcome by a specific device that can read the chip to match it with a different car. If you need a transponder-related key replaced it is necessary to visit an locksmith with the tools needed to reprogram the key to your vehicle. Some car dealerships offer this service as well but they tend to be more expensive than an independent locksmith because of their overhead. It can be difficult to find an original key that comes with a chip. To program your car, the key has to be programmed using a specific machine. It requires specialized software as well as the appropriate key cutter to do the job properly. Many auto parts stores are able to clone some of the simpler keys for chips, but you must know the serial number from the original key to ensure that the correct data is programmed 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 should. Laser-Cut Keys Laser-cut keys, also known as sidewinder keys due to their distinctive winding cuts to the shank of the key provide an additional layer of security to your vehicle. Because it takes specialized machinery to duplicate these keys, they're an excellent protection against auto theft. They also come with built-in chips that prevent unauthorized key copying from starting your vehicle. They also come with a unique code on the key, which must be programmed to your specific car in order to unlock it and start it. This extra layer of security is an excellent method to safeguard your investment and deter thieves who could be trying to steal your car to make parts or sell it on. Laser-cut keys differ from mechanically-cut keys in terms of design. They have fewer grooves carved out on the key. They also have a larger key shaft, which is a good indication that it's not your regular car key. Locksmiths usually use milling machines to cut these keys. It's akin to a drill bit and it's designed to cut metal with precise angles. These are the most secure keys that you can purchase for your vehicle. They are extremely difficult to duplicate and can only by cut by a certified locksmith or dealer. They're not made using traditional keys. Instead, they are constructed from a small piece of steel that is cut to form a code in the factory, and then cut with the laser. This type of key can withstand a lot wear and tear, and is one of the best choices for protecting your vehicle. Depending on the key, it can fold into the fob or pop out by pressing the button. The keys are typically used in German cars, and provide an extra layer of protection against car thieves. They also make it very difficult for a thief to pick your vehicle or pick-lock it because the cylinder is extremely durable and difficult to break into. Smart Keys Keys Smart keys communicate with the vehicle using radio-frequency identification (RFID) instead of the traditional single piece of carved metal. This means they have a small chip that has an encrypted code that is unique to each key. The key transmits a message to the onboard computer of your vehicle each time you unlock the doors or open the trunk. The computer then will prompt the appropriate frequency to allow you to start your car. The smart key's chip has a number of security features to guard against theft. The key emits a low-frequency signal, which will only be detected by your vehicle. If the computer onboard detects this signal it will transmit an additional signal that is a unique code that only your car can understand. This will stop a tech-savvy criminal from using an electronic pulse generator to “fool the system” and make the key work on other vehicles. In cost of a car key replacement to locking and opening the car, some smart keys come with additional features such as storing specific preferences for drivers remote opening windows or the sunroof, and more. These are accomplished by activating the key fob's proximity sensor, pressing a button on the key itself or, in certain cases, twisting a small metal component inside the key. Certain key fobs are opened by placing the dead key in a slot, or by placing it near an inductive coil on the dashboard. Some even come with an emergency (fully mechanical) key blade that is hidden inside the key to enable this. To replace a smart key, you'll need visiting a dealer, who can either request the replacement or have it in stock. They'll also need to program the new key to recognize your car. You can also visit a locksmith for your replacement key fob to be programmed and then replaced. A locksmith may cost more than dealers, but they will do the job faster and cheaper.