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Reprogramming Car Keys Transponder keys for car keys are thought to keep cars more secure and are harder for thieves to duplicate. However, keys may need to be reset when it becomes damaged or lost. You can change the key fobs you own but you must be aware of the correct procedure. For the best results you'll need the following items: Keys Almost all modern cars require some kind of transponder key or fob to operate, ensuring security and anti-theft protection. These keys must be programmed to your particular vehicle and its features by a certified locksmith or dealer. It's costly to replace them if they're lost, so it's a good idea to keep extras on hand. You will also find replacement key fobs on various websites and in many brick-and mortar auto shops. But how do you know that the one you have bought is authentic? Do you know whether it has been programmed to work with another vehicle or if it could be reprogrammed to fit your vehicle? To program a new car keys, you must first ensure that your car is running. Insert the key you want to reprogram into the ignition, but do not turn it. There are only a few seconds before the system resets all commands and leaves the programming mode. This is why it is essential to be quick and not wait between steps. To avoid this happening, turn off the engine. Turn the key from “on” to “off” to test the system. The door locks should be able to cycle, and you will hear a chime signalling that the process was successful. Some newer cars use a rolling key technology that prevents thieves from using a stolen vehicle's key to start it. This feature is still susceptible to a technique dubbed a replay attack. It allows thieves to record and reproduce the signal received from the key fob of the vehicle to unlock the car. To prevent this, manufacturers have added a security feature known as the CAN bus protocols to ward off hackers from gaining access to the vehicle. Certain manufacturers also employ special encryption on their key fobs, which cannot be decoded by an easy program. You should only try this method if your previous experience is with electronic devices. It is recommended to read your car's owner manual or look up the manufacturer on the internet, since the steps will differ depending on the car model. Transponder chips Car keys with transponder chips require special reprogramming in order to function. Any hardware store can offer you an entirely new car key, but the real challenge lies in making it work with your vehicle. The key you reprogrammed needs to be matched with the specific identification number of your car otherwise it won't even start the engine. Transponder chips are a typical feature of modern cars and are designed to stop car theft. The chip is a small microcircuit that transmits a radio-frequency signal when the ignition key is inserted. The car then detects the signal and begins the engine in case it matches the original frequency that was programmed into the vehicle. The car is also programmed to stop when it detects an incompatible frequency. This makes it much harder for thieves who are not experienced to hot wire a vehicle and start it. The chip and the key are connected via the circuit board which includes an induction coil. When the key is placed in the ignition the magnetic field is generated around the transponder. This produces a signal which gets absorbed by the coil, which sends it to the key's identification number. The key's identification number is then returned to the car and the engine will start when the identification number matches. There are a few different ways to program a transponder keys, however, they all require an instrument that is specifically designed for the purpose. You can buy these tools online or at most locksmiths in the automotive industry. These tools aren't expensive, but they are essential for programming the chip in your car. You may also make use of a transponder key that can be reprogrammed that was previously programmed for another vehicle. In this case you'll need sure that the key is not damaged or the transponder been altered in any way. The chip can be read using a scanner, or a computer that has the USB connector. Reprogramming the transponder key is easy, but it will require an expertly designed software and scan tool. If you're just beginning, it's best to seek help from an auto locksmith. Avoid buying used keys as they could already be programmed, and they won't work with your vehicle. EZ Installer Prior to recently those who wanted to replace their keys were required to visit an agent to have it digitally paired to the vehicle. This is because modern keys require to be “paired” to the vehicle of the owner in order to work in a way that required the use of expensive and complicated equipment that only dealers could access. The EZ Installer from Car Keys Express solves this problem for retailers and locksmiths by making it easier for connecting modern keys to vehicles. The Easy Installer is a straightforward, “plug and play” OBD device that connects new keys with vehicles without the need for complicated equipment or programming tokens. It connects directly to the vehicle's standard OBD port, and then using an app for mobile devices to provide easy-to-follow instructions. The EZ Installer is compatible with all modern vehicles with proximity keys or push-button start. Check the compatibility guide at Tom's website to determine if your vehicle is compatible. A full money-back guarantee is offered in the event that the device fails to successfully program a key or remote purchased from Tom's for a compatible vehicle. In contrast to traditional programming equipment, which costs retailers and key professionals tens of thousands of dollars in “token” fees per key, the EZ Installer Pro does not charge these fees. It is able to be used for as long as the key professional or retailer needs. The EZ Installer also eliminates the necessity for expensive monthly service agreements and updates, which means it will save retailers money while still 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 owners of vehicles can utilize car key programming tools to create new keys for vehicles. These tools communicate with the vehicle's immobilizer in order to program new keys and remotely controlled. They can also be used to clone existing keys and create duplicates. These tools are a useful tool for those who own a car. Autel Maxisys MS906BT is among the most well-known tools to program keys for cars. The scanner for diagnostics of vehicles has advanced features that are OE-grade and is compatible with the majority of the major brands. It also includes a key programming function and is able to backup current key data. It can also reset the immobilizer, or clear the fault code. The OTOFIX IM1 is another important tool to reprogramme keys for cars. This auto diagnostic scanner comes with advanced functions that are OE-level and can read passwords from all major brands. It also allows online calibration, customization, and EEPROM reading. The tool comes with an option that allows it to bypass the PIN code of BMW and Mercedes. It also has the ability to read EEPROM, car MCU and CAN EEPROMs for the majority of major models. The bidirectional scanner XToolUSA is another popular choice for reprogramming vehicles. This tool is a great tool for auto repair shops as well as locksmiths because it can read codes and key data from the majority of vehicles in a matter of minutes. It also features an active test function that helps identify the problem quickly and efficiently. There are a variety of ways to modify the car's programming. It is essential to have the right tools, and also to know how they function. Incorrect programming may cause damage to the immobilizer on the vehicle and stop it from starting. Before attempting to reprogram automotive key programming , it is best to seek advice from a professional. Another option is to purchase the kit that comes with a key programmer, remote control key, and transponder chips. This will ensure that you're equipped with all the tools you require to reprogram your car key. This method is more time-consuming and requires expertise in soldering and electronic devices.