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Reprogramming Car Keys Transponder keys are thought to be more secure for vehicles and more difficult to copy by thieves. Keys may need to be reprogrammed in event of damage or lost. You can program key fobs yourself, but you must know the correct process. For the best results you must have the following items: Keys Modern cars require a transponder key in order to operate. This is a security feature and anti-theft protection. The keys are programmed by a locksmith or authorized dealer to function with your car's system and specific model. It is expensive to replace them if they are lost, so it's best 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 how to reprogram car key tell that the key fob you bought is authentic? Are you able to tell if the unit has been programmed to work with another vehicle or if it could be reprogrammed? To program a new car keys, first make sure that your vehicle is running. Insert the key you wish to program into the ignition, but do not turn it. There are only a few seconds before the system will reset all commands and then exits the programming mode. For this reason, it is essential to move quickly and not pause between steps. To prevent this from happening, turn off the engine. Turn the key from “on” to “off” to test the system. The door locks should cycle and you'll hear a chime to indicate that the process was successful. Some newer cars use a rolling key system, which keeps thieves from using stolen cars' key to open it. This technology is still vulnerable to a method known as a replay attack which allows thieves to record the signal received from the vehicle's key fob and reproduce it later to open the car. To prevent this, manufacturers have added a security feature called CAN bus protocol to thwart attacks on hacking. Certain manufacturers have a unique encryption on their keys, which cannot be decoded using an easy program. You should only attempt this process if your experience is in electronics. It is recommended to consult your car's owner manual or search for the manufacturer online, as the steps differ based on car model. Transponder chips Car keys with transponder chips require a special reconfiguration to work. While any hardware store can cut a new key for you, the real challenge is making it function with your specific car. The key needs to be programmed to match the exact identification number on your car, or else it will not start. Transponder chips, used to stop theft of cars, are a common feature of modern cars. The chip is a microcircuit that transmits a radio-frequency signal when the ignition key is placed. The car then detects the signal and starts the engine in case it matches the original one that was programmed into the vehicle. The car also shuts down if the frequency is invalid. This makes it more difficult for thieves who aren't experienced to hot-wire a vehicle and then turn it on. The key and the chip are linked by an electronic circuit board that contains an induction coil. When the key is put in the ignition, a magnetic field is generated around the transponder. This generates a signal, which is taken up by the coil before being sent to the key's identification. The key's identification code is transmitted back to the car and the engine will start if the identification number matches. There are a variety of ways to program a key transponder, but all require a special tool. You can buy these tools online or from most automotive locksmiths. They are not cheap, but they are essential for programming the chip to your car. You may also make use of a transponder key that can be reprogrammed that has been previously programmed for a different vehicle. In this case, ensure that the key hasn't been damaged or that the transponder is not altered in any way. You can read the chip with a scanner, or a computer that has the USB connector. Reprogramming a transponder key is quite simple, however it requires an expertly designed software and scan tool. If you're a beginner, it's best to seek help from an auto locksmith. Avoid buying used keys as they could already be programmed and won't work with your car. EZ Installer For a long time, car owners who needed to replace their key fob had no alternative than to visit a dealer to get their key paired to the vehicle. This is because modern keys have to be “paired” to a specific vehicle to function and work, which required expensive and complicated equipment that only dealers could access. The EZ Installer from Car Keys Express solves this problem for locksmiths and retailers by making it easier for connecting modern keys to vehicles. The EZ Installer is a basic, “plug and play” OBD device that connects 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 using a mobile app to provide simple instructions. The EZ Installer works with a wide range of modern vehicles with proximity keys or push-button start. Visit 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 the full refund will be offered. In contrast to traditional programming equipment that costs key professionals thousands of dollars in typical per-key “token” costs, the EZ Installer Pro doesn't charge these fees at all, so it can be used for as long as a retailer or key professional wants to keep it. The EZ Installer eliminates the need for costly monthly service contracts and software updates. This lets retailers save money while providing their customers the same high-quality service as OEM equipment. It also offers a top warranty that covers both hardware and software for the rest of your life. Tools Car key programming tools can be utilized by locksmiths, auto technicians and even owners of vehicles to programme new keys for their automobiles. These tools communicate with the vehicle's immobilizer to program new keys and control them remotely. They can also be used to duplicate existing keys and create duplicates. These tools are an essential tool for anyone who has a vehicle. One of the most popular car key programming tools is the Autel Maxisys MS906BT. This scanner for vehicle diagnostics has advanced features that are OE-grade and is compatible with most of the major brands. It also includes a key programming function and can backup the most recent key information. It also resets the immobilizer, or clear the fault codes. Another essential tool for car key reprogramming is the OTOFIX IMM1. This auto-diagnostic scanner has advanced OE-level functions and can read passwords from the majority of major brands. It is also able to perform online calibration as well as customization and reading of EEPROM. The tool comes with the ability to bypass the PIN code for BMW and Mercedes. It also has the ability to read EEPROM, car MCU and CAN EEPROM for most major models. The bidirectional scanner XToolUSA is another popular choice to reprogramme vehicles. This tool is a great tool for auto repair shops as well as locksmiths because it can read key data and codes from most vehicles within minutes. It also has a live test feature that can help determine the cause quickly. While there are many different ways to reprogram a car it is important to select the appropriate tools and to know how to use them. Uncorrect programming can damage the vehicle's immobilizer and stop it from beginning. It is recommended to seek advice from a professional prior to trying to reprogram your car key. You can also purchase a kit which includes a key programmer, remote control key and transponder chip. This will ensure that you are equipped with everything you require to reprogram your car's key. This method, however, takes longer and requires some knowledge of electronics and soldering.