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Reprogramming Car Keys Transponder keys are said to be more secure for cars and harder to copy by thieves. However, a key may require reprogramming when it becomes damaged or lost. You can change the programming of your key fobs at home, but you should know the right process. reprogram car key must have these things to get the best results: Keys Most modern cars require a transponder keys to operate. This is a security feature and anti-theft protection. These keys are programmed by a locksmith or authorized dealer to function with the car's systems and specific model. They are costly to replace if lost and it is recommended to keep spare keys in the car. You can locate key fobs that can be replaced in online stores as well as many brick-and mortar auto shops. How do you ensure that the one you have bought is genuine? Can you tell whether the unit has been programmed to work with a different vehicle, or if it can be programmed again? If you're looking to program a new key the first step is to ensure that your car is operating. Insert the key that you'd like to program into the ignition, but don't turn it. You only have just a few seconds before the car's system reverts the commands and then exits programming mode. It is essential to be quick and don't delay between each step. To prevent this from happening, turn off the engine. Change the key from “on” to “off” to test the system. The door locks should be able to cycle, and you will hear a sound that indicates that the process was successful. Certain cars with more modern technology have rolling key system, which prevents thieves from using stolen cars' key to open it. The feature is still vulnerable to a technique called a replay attack. It allows thieves to record and then reproduce the signal received from the car key fob to unlock the car. To stop this, manufacturers have added an additional security feature known as the CAN bus protocol to stop hacking attempts. Some manufacturers also use special encryption on their key fobs which cannot be decoded by a simple program. You should only attempt this process if your experience is in electronics. Consult your car's manual or look up the manufacturer's website to learn how to program it. The steps to follow will differ depending on the model of vehicle. Transponder chips Car keys with transponder chips require a specific reprogramming to work. Any hardware store can make you an entirely new car key, however the real challenge lies in making it work with your vehicle. The key you reprogrammed needs to be matched with the exact identification number of your vehicle or else it won't be able to start the engine. Transponder chips, which are used to stop theft of cars are a standard feature of modern automobiles. The chip is a microcircuit which transmits a radio-frequency signal when the ignition key is put in. The car then detects the signal and begins the engine if it matches the original signal that was programmed into the vehicle. The car also shuts down if the frequency is invalid. This makes it harder for thieves who aren't experienced to hot-wire a vehicle and then start it. A circuit board that has an induction coil connects the chip to the key. When the key is inserted into the ignition it creates an electric field around the transponder. This creates a signal which is received by the coil and then transmitted to the key's identification. The key's identification number is transmitted back to the car and the engine is started if the identification number matches. There are a few different methods to program a transponder keys, but they all involve using an appropriate tool. You can purchase these tools online or at most automotive locksmiths. These tools aren't inexpensive, but they are vital to program your car's chip. You can also use an unreprogrammable key that was programmed for an alternative vehicle. In this case you'll need sure that the key has not been damaged or the transponder has been altered in any way. The chip can be read using a scanner, or a computer with an USB connector. The process of reprogramming a transponder key is quite easy, but it will require special software and a scanning tool. It's best to ask an auto locksmith for help in case you're not an expert. Avoid buying used keys as they might already be programmed, and they won't be compatible with your vehicle. EZ Installer For a long time, car owners who needed to replace their key fob had no option than to go to a dealer to get their key paired to the vehicle. This is because, in order to make modern keys work they must be “paired”. This required expensive and complex equipment that was only available to dealers. The EZ Installer by Car Keys Express simplifies the process of pairing modern keys with vehicles for locksmiths and retailers. The EZ Installer, a basic “plug-and-play” OBD device, connects new keys to vehicles without the use of complicated equipment or tokens for programming. It works by connecting directly to the vehicle's standard OBD port, and then using an app for mobile devices to provide simple instructions. The EZ Installer is compatible with all modern vehicles that include proximity keys or push-button start. Visit the compatibility guide on Tom's website to determine whether your vehicle is compatible. If the device is unable to program the remote or key purchased from Tom's into a compatible vehicle then a full refund is offered. In contrast to traditional programming equipment that can cost retailers and key professionals thousands of dollars in typical per-key “token” charges, the EZ Installer Pro doesn't charge these fees at all which means it can be used for as long as a key professional wishes it to be. The EZ Installer also eliminates the need for costly monthly service contracts and updates, so it could reduce costs for retailers while offering customers the same high-quality service as OEM equipment. It also comes with a world-class warranty that covers all hardware and software for the life of the product. Tools Locksmiths, auto mechanics and vehicle owners can use car key programming tools to program new keys for cars. These tools connect to a vehicle's immobilizer in order to program new keys and remotely controlled. These tools can be used to create duplicates and duplicate keys. These tools are a valuable tool for anyone who has a vehicle. One of the most popular tools for programming keys to cars 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 current key data. It also has the capability of resetting the immobilizer as well as clearing immobilizer fault codes. The OTOFIX IM1 is an important tool for reprogramming car keys. This auto diagnostic scanner has advanced functions that are OE-level and can read passwords from most major brands. It is also able to perform online calibration, customization, and reading EEPROM. The program also has the ability to bypass a BMW or Mercedes PIN code. It also has the ability 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. It can read codes and key information from most vehicles in just a few seconds which makes it a perfect tool for auto shops as well as locksmiths. It also has an active test function that helps determine the cause quickly and efficiently. There are a variety of ways to modify the car's programming. It is important to have the proper tools and to understand how they function. Incorrect programming could cause damage to the vehicle's immobilizer system, and may prevent it from working. It is recommended to seek advice from a professional prior to trying to reprogram a car key. Another option is to buy an entire kit that includes keys, a key programmer, remote control key, as well as transponder chips. This will ensure that you're equipped with everything you need to reprogram your car's key. This method, however, will take more time and requires a basic understanding of electronic circuits and soldering.