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Replacing a Key Fob Modern cars are equipped with key fobs that enable drivers to remotely start the car and open doors. They can also set off the alarm. These remote devices look like advanced car keys, with buttons, and they often hide a switchblade key or laser-cut keys inside. The process of replacing a car fob key typically requires visiting a dealership or an automotive locksmith, but you may have other options as well. Here are a few. Battery The key fob is used to control the security features of your car, including remote entry and ignition start. In the 1990s keyless entry became a standard. The majority of new models use key fobs to unlock doors and arm alarms with the touch of a button. Based on the functions they perform the devices could cost between $150 and several hundred dollars. However, replacing a key fob's battery is an easy, cost-effective process, and you can do it without having to visit an auto dealer. The battery in your keyfob is a coin shaped device. It can be removed from the plastic clip by removing it. After releasing the clip, you can take the battery off and replace it using an screwdriver. Certain key fobs come with batteries that are easily accessible by simply sliding it out, while other include an internal battery that requires more effort to replace. After you have removed the battery, take off the plastic or metal covering the posts, both positive and negative. car key and fob replacement are typically marked with a cover in red and a cable, while the negative will be marked by an orange stripe or an inscription. A few older key fobs look like an ornamental keychain made of plastic with buttons that open the door, or remotely start your car. These devices can be disguised as keys that are cut-able. The latest fobs, which don't contain an encrypted key, operate differently. They have an electronic transmitter that emits unique signals that can only be read by your car. If you have an additional key fob, use it to determine if it will work with the engine of your car. If it doesn't work, you'll need to have the fob changed by an authorized dealer. If you have a key fob with more advanced features like an LCD display, it could be more expensive, but will likely be the only way to operate your vehicle. Some dealers charge a fee for this service, whereas others have a technician in their staff who can perform the service. Programming Key fobs are an electronic device that lets you to unlock your car and start it without the use of the physical key. It is powered by a small battery and communicates with your vehicle via radio frequency. Most vehicles use a code to identify the appropriate radio frequency to transmit the information. If the replacement fob is not properly programmed, the vehicle will not recognize it, and will not start or unlock the doors. The programming process is relatively simple for many automobiles, and the majority of key fobs can be reprogrammed through a locksmith or dealership. The code for your vehicle is usually found in the owner's guide or is available from a dealer. It also requires the appropriate tools, which can be found at some dealerships as well as auto parts stores and certain locksmiths. Some key fobs require reprogramming with the help of specific software, which can only be accessed by an authorized dealership or auto locksmith. These programs are used to maintain the integrity of the EEPROM which is the storage device for sensitive information and security codes on the computers of your vehicle. If the wrong software is used it could cause damage to the EEPROM and cause your car to stop working according to the latest Consumer Reports article. While it's tempting to buy a replacement fob for a low price online and try to save money by programming it yourself, experts suggest not going down this route. Apart from the fact that you could be risking your vehicle's security and safety, this could lead to more problems, such as an unrepaired fob or a computer that is not functioning. A locksmith is capable of programming an entirely new key for you at a reasonable price. Choose a reputable company which is insured in the event something goes wrong and your car is damaged. Additionally, it's an excellent idea to look over your warranty, car insurance policy, or auto club membership to see whether they'll pay for the cost of a new key fob, or assist in paying the costs of the repair. Dealership In the past, keys made of steel were used for opening the doors of a car and also for to start it. But, in the '90s and beyond increasing numbers of automobiles were sold with key fobs that provided convenience features such as push-button ignition and enhanced security. Nowadays, nearly every new car comes with key fobs as standard equipment. If you have lost a key fob it, the only option to replace it is to visit the dealer, where you'll probably be required to pay for a new one and have it programmed for your vehicle. This could cost hundreds of dollars, depending on the type of key and the features. The car's manufacturer decides on the amount the replacement fob will cost and it can differ in relation to the material, brand name, keyless entry feature, and much more. For instance, a key fob with advanced security features such as rolling code encryption and anti-theft technology will have a higher price tag than one that only allows you to open the doors and start the engine. The cost of replacing a key fob could be covered under your warranty, auto insurance policy or an auto club membership. In some instances it is possible to save money by buying an auto parts store fob that has the same appearance and programming as your original. You can also find inexpensive and easy-to-program replacement fobs for various vehicles from online stores. Some dealers only sell replacement fobs for the specific model of car in which you drive, and that's often because of their high-tech systems. BMW, Mercedes-Benz, and other high-end brands, for instance, use a rolling-code encryption which cannot be deciphered with aftermarket fobs. If you own a vehicle that has a basic keyfob, you could purchase the replacement from a big box retailer or hardware store for around $50. You can then replace the battery on your own or ask an expert locksmith to take care of it for you. The majority of batteries on the car key fob are coin-shaped and cost $10 or less it's a simple fix. You can find instructions in the owner's manual or by searching YouTube for the model you have. Auto Parts Store You can save money by going to your local auto parts store instead of the dealership when you need to replace an old car key that is not a fob or if the mechanical key in your car is not working. They usually stock various replacement keys, from basic oval or rectangular key fobs to switchblade key models. They can also cut keys and program it for you at less than the cost of a dealership. Most newer cars use fob keys which communicate with the vehicle through radio frequency signals. This technology, first developed in the late 90s, enables you to lock and open your car doors, turn off the alarm, and even open the trunk without putting an actual key into the ignition. Fobs work with a variety of automobiles however, not all. This is why If your car has an incompatible fob, or one that's not functioning correctly, you might need to replace the entire unit instead of just the key itself. It is possible to purchase an replacement fob on retailers like Amazon or eBay or specialist automotive retailers but you'll have go to the dealer for the most current models. This is because these dealers have the equipment needed to prepare a fob to ensure it's compatible with your particular car. Some older fobs such as those from cars made before the 1990s and don't have an advanced security systemcan be purchased from the auto parts store and then programmed by following the online instructions. Consumer Reports says that the best method to save money on a key for your car replacement is by comparing prices before making an purchase. For example, they recommend consulting with your auto insurance company and roadside assistance company to see if they are able to assist. You can also attempt to solve the issue yourself, by putting off several days before purchasing an additional key. Extreme cold and heat or even just sweat can cause fobs to cease working so you may be able to cause it back to life if you give the fob some time to rest. You may also be able repair your fob if you reset it. This is a simple procedure that's described in your owner manual.