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Reprogramming Car Keys Car keys with transponders are thought to keep cars more secure and are less likely to be duplicated by thieves. A key may have to be reprogrammed in case of damage or lost. You can reprogram key fobs yourself however, you must be aware of the proper procedure. To get the best results, you should have the following items: Keys Most modern cars require a transponder keys to operate. This gives security and protection against theft. The keys have to be programmed to the specific vehicle and its features by a licensed locksmith or dealer. They can be costly to replace if they are lost therefore, you should have spares in your car. You can also find replacement keys fobs in various online stores and in a variety of brick-and-mortar automotive shops. But how can you tell that the new one you have bought is genuine? Do you know if it has been programmed for another car or if it is able to be reprogrammed for yours? To program a new car key you must first ensure that your car is running. Insert the key you wish to reprogram into the ignition, but do not turn it. You have only a few seconds before the system will reset all commands and exits the programming mode. This is why it is important to be quick and not wait between steps. To prevent this from happening, shut off the engine. You can test the system of your car by turning the key to the “on” position, then back to the “off” position. You should hear a chime indicating that the process was successful. The door locks will cycle. Certain newer vehicles have rolling key technology that stops thieves from using a stolen car's key to start it. This feature is still vulnerable to a technique dubbed a replay attack, which allows thieves to record the signal received from the vehicle's key fob, then reproduce it to open the car. To stop this, manufacturers have introduced a security feature called CAN bus protocol to thwart attacks on hacking. Certain manufacturers also have special encryption on their key fobs, which cannot be decoded by an easy program. It is best to only attempt this process if your experience is in electronics. Consult programmed car keys or go to the website of the manufacturer to learn how to program it. The steps to follow will differ depending on the type of vehicle. Transponder chips Car keys with transponder chips require a special programming to function. Any hardware store can give you a new car key, however the real challenge lies in making it work with your car. The key you reprogrammed needs to match the exact identification number of your vehicle otherwise it won't even start the engine. Transponder chips are a standard feature in modern cars and are designed to prevent car theft. The chip is a microcircuit which transmits a radio frequency signal when the key is inserted in the ignition. The car detects the signal, and starts the engine only if the signal matches the original that was programmed in the vehicle. The car will also shut down if the frequency is not valid. This makes it difficult for thieves who aren't experienced to connect a vehicle to a hot wire and then start it. A circuit board with an induction coil connects the key to the chip. When the key is placed in the ignition it creates an electromagnetic field around the transponder. This creates a signal which is taken up by the coil and sent to the key identification number. The key's identification number is then returned to the car, and the engine starts when the identification number matches. There are many ways to program a key transponder, however each requires an instrument that is specifically designed for. These tools can be bought online or from most automotive locksmiths. They are not cheap, but they're vital for programming the chip into your vehicle. You may also use a resettable key that was programmed for an alternative vehicle. In this instance, you must make sure that the key hasn't been damaged or the transponder is not altered in any way. The chip can be read by using a scanner or a computer with an USB connector. Reprogramming an transponder is a simple procedure, but it requires special software. It also requires a scanner tool. It is recommended to contact an auto locksmith for assistance in case you're not an expert. You should also avoid buying second-hand keys as they are likely already programmed and won't work with your car. EZ Installer In the past those who wanted to replace their key fob were forced to go to an agent to have it digitally paired to the vehicle. It is because to make modern keys function they must be “paired”. This required expensive and complex equipment that was only available to dealers. The EZ Installer from Car Keys Express solves this issue for retailers and locksmiths by easing the process of pairing modern keys with vehicles. The Easy Installer is a straightforward, “plug and play” OBD device that pairs new keys to vehicles, without the need for expensive equipment or programming tokens. It works by connecting directly to the vehicle's standard OBD port, and then using an app for mobile devices to provide simple-to-follow instructions. The EZ Installer works with all newer models that have proximity keys or push button start. Go to the compatibility guide on Tom's site to see whether your vehicle is compatible. If the device is unable to program a remote or a key purchased from Tom's into a vehicle that is compatible, a full refund is offered. Unlike traditional programming equipment that costs key professionals thousands of dollars through typical per-key “token” costs, the EZ Installer Pro doesn't charge any fees and can be used for as long as a key professional wants to keep it. The EZ Installer also eliminates the need for costly monthly service contracts and updates, so it could save retailers money while still offering customers the same high-quality service as OEM equipment. It also offers a top warranty that covers both hardware and software for the remainder of your life. You can also find out more about Locksmiths, auto mechanics and vehicle owners can use car key programming tools to create new keys for vehicles. These tools communicate with a vehicle's immobilizer to program new keys and control them remotely. These tools can be used to create duplicate keys and to clone keys. These tools are a valuable tool for anyone who owns a car. One of the most well-known tools for programming car keys is the Autel Maxisys MS906BT. This vehicle diagnostic scanner is compatible with the major brands and provides advanced OE features. It also has an option for key programming and is able to backup the most recent key information. It can also reset the immobilizer or clear immobilizer fault codes. Another essential tool for car key reprogramming is the OTOFIX IMM1. This auto diagnostic scanner is able to read passwords for all major brands and comes with advanced features that are OE-level. It can also perform online calibration, customization and reading of EEPROM. The program also has the ability to bypass the BMW or Mercedes PIN code. It is also able to read EEPROM, car MCU, and CAN EEPROMs for the majority of major models. The XToolUSA Bidirectional Scanner is another popular choice for reprogramming vehicles. This scanner can read key information and codes from most vehicles within a few seconds and is a fantastic tool for auto shops as well as locksmiths. It also features an active test function that allows you to determine the cause quickly and efficiently. There are a variety of ways to reprogram your car. It is essential to have the proper tools, and to know how they function. Uncorrect programming can cause damage to the immobilizer on the vehicle and prevent it from beginning. Before attempting to reprogram your car key, it's best to seek advice from a professional. You can also purchase a kit which includes the key programmer, a remote control key and transponder chip. This will ensure that you are equipped with everything you need to reprogram your car's key. However, this method will take more time and requires some knowledge of electronic circuits and soldering.