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Reprogramming Car Keys Transponders in car keys are thought to keep vehicles safer and are less likely to be duplicated by thieves. The key could need to be programmed again in the case of damage or lost. You can program key fobs yourself however, you must be aware of the proper procedure. It is essential to have these items to achieve the best results: Keys Most modern cars require a transponder key to operate. This is a security feature and protection against theft. The keys are programmed by a locksmith or an authorized dealer to function with your car's system and the specific model. It's expensive to replace them if they are lost, so it's a good idea to have spares in your possession. You will also find replacement key fobs on various websites and in many brick-and-mortar auto shops. But how can you tell that the key fob you bought is authentic? Are you able to tell whether it has been programmed for another car or if it could be reprogrammed to fit your vehicle? To program a new car key you must first ensure that your car is running. Insert the key you want to program into the ignition, but do not turn it. You will only have a few seconds before the car's system resets the commands and leaves programming mode. For this reason, it is important to be quick and not wait between steps. To avoid this happening, shut off the engine. You can check the car's system by turning the key to the “on” position and then back to the “off” position. The door locks should be able to cycle, and you will hear a chime signalling that the procedure was successful. Certain newer vehicles have rolling key system, which prevents thieves from using stolen cars' key to open it. This feature is still vulnerable to a method known as a replay attack which allows thieves to record the signal of the vehicle's key fob and reproduce it later to open the car. To prevent this, manufacturers have introduced a security feature called CAN bus protocol to stop attacks on hacking. Some manufacturers use a special encryption on their keys that cannot be decoded using an easy program. These types of vehicles will need to be programmed by a professional. Therefore, you should only attempt this process only if you've worked with electronics. It's a good idea to read your car's owner manual or look up the manufacturer on the internet, since the steps differ based on vehicle type. Transponder chips Car keys that feature transponder chips require a special reconfiguration to work. Any hardware store can give you a new car key but the real challenge is in implementing it to your car. A key that has been reprogrammed will need to match the exact identification number of your vehicle or else it won't be able to start the engine. Transponder chips, used to prevent car theft, are a common feature of modern cars. The chip is a microcircuit that emits a radio frequency signal when the ignition key is put in. The car is able to detect the signal and begins the engine only if the signal matches the one programmed in the vehicle. The car also shuts down if the frequency is invalid. This makes it much harder for car thieves with no experience to hot wire a vehicle and start it. A circuit board that has an induction coil that connects the key to the chip. When the key is placed in the ignition, it creates an electric field around the transponder. This generates a signal that is absorbed by the coil, which sends it to the key's identification number. The key's identification code is returned to the car and the engine will start when the identification number matches. There are many ways to program a transponder keys, however, all require an instrument that is specifically designed for the purpose. These tools are available through the internet or from many automotive locksmiths. These tools are not expensive, but they are essential for programming the chip in your car. You may also utilize a transponder that is reprogrammable that was previously programmed for another vehicle. In this case, ensure that the key isn't damaged or the transponder isn't altered in any way. You can read the chip using a scanner, or a computer equipped with the USB connector. The process of reprogramming an transponder's key is easy, but it will require specialized software and a scan tool. It is recommended to contact an auto locksmith for help in case you're not an expert. You should also avoid buying second-hand keys, since they're likely to be programmed and won't work with your car. EZ Installer For decades, car owners who required replacement of their key fob had no choice than to visit a dealership to have their key electronically paired to the vehicle. This is because, in order to make modern keys work, they need to be “paired”. This required expensive and complicated equipment that was available only to dealers. The EZ Installer by Car Keys Express simplifies the process of pairing up modern keys with vehicles used by retailers and locksmiths. The EZ Installer is a basic, “plug and play” OBD device that pairs new keys to vehicles, without the need for complicated equipment or programming tokens. It connects directly to the standard OBD port of the vehicle, and runs an application that is mobile that provides easy-to-follow instructions. The EZ Installer is compatible with the majority of newer models that have proximity keys or push button start. To see if it will work with a specific vehicle, look up the compatibility guidelines on Tom's site. If the device fails to program the remote or key purchased from Tom's into a compatible vehicle the full refund will be provided. Unlike traditional programming equipment, which costs key retailers and professionals hundreds of thousands of dollars in “token” fees per key, the EZ Installer Pro does not charge these costs. It is able to be used as long as a key professional or retailer requires. The EZ Installer also eliminates the requirement for expensive monthly service contracts and updates, meaning that it could save retailers money while providing the same quality service as OEM equipment. It also comes with a renowned warranty that covers both hardware and software for the duration of your life. Tools Car key programming tools are used by locksmiths, auto technicians and owners of vehicles to program new keys for their automobiles. These tools communicate with the vehicle's immobilizer system to program new keys and remote controls. These tools can be used to make duplicate keys and to make keys cloned. These tools are an invaluable tool for anyone who owns a car. One of the most popular car key programming tools is the Autel Maxisys MS906BT. The scanner for diagnostics of vehicles has advanced features that are OE-grade and is compatible with most of the major brands. It has an essential programming feature that allows you to backup the current key information. It also resets the immobilizer or erase the fault code. The OTOFIX IM1 is another important tool to reprogramme car keys. This auto diagnostic scanner can read passwords from all major brands and comes with advanced features that are OE-level. It can even perform online calibration and customization as well as reading EEPROM. The tool also has the ability to bypass a BMW or Mercedes PIN code. It also has the ability to read EEPROMs, car MCUs and CAN-EEPROMs for most major models. The Bidirectional scanner XToolUSA is a popular choice to reprogramme vehicles. It can read codes and key information from most vehicles within a few seconds, making it a great tool for auto shops as well as locksmiths. It also features an active test feature that helps determine the cause quickly. There are a variety of ways to reprogram your car, it is essential to select the appropriate tools and to be aware of how to utilize them. Incorrect programming may damage the vehicle's immobilizer and stop it from starting. It is recommended to seek advice from a professional prior to trying to reprogram your car key. You can also purchase a kit that includes a key programmer, remote control key, and transponder chip. This will ensure that you have everything you need to reprogram your car key. However, this method will take more time and requires some understanding of electronics and soldering.