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Reprogramming Car Keys Car keys with transponders are believed to make vehicles more secure and less likely to be duplicated by thieves. Keys may need to be reprogrammed in the case of damage or lost. You can reprogram your key fobs at home, however you must be aware of the proper procedure. To get the best results, you'll need the following items: Keys Most modern vehicles require a transponder fob or transponder keys to operate, providing security and protection against theft. The keys are programmed by a locksmith or authorized dealer to work with your car's system and the specific model. It's costly to replace them if they become lost, so it's better to keep extras on hand. You can also find replacement keys fobs at various online stores and in many brick-and mortar auto shops. How can you know that the one you bought is authentic? Can you tell whether it has been programmed for a different vehicle or if it is able to be reprogrammed to fit your vehicle? If you're looking to program a new key the first step is to ensure that your car is operating. Insert the key you wish to reprogram into the ignition without turning it. You have just a few minutes before the system will reset all commands and leaves the programming mode. For this reason, it is essential to be quick and not be able to wait between steps. To avoid this happening, shut off the engine. You can test the car's security system by turning the key to the “on” position and back to the “off” position. The door locks should be able to cycle, and you will hear a chime signalling that the process was successful. Certain newer vehicles utilize rolling keys to keep thieves from using stolen keys to start the car. This feature is still vulnerable to a technique dubbed a replay attack. It allows thieves to record and duplicate the signal generated by the car key fob to open the car. To stop this, manufacturers have added a security feature called the CAN bus protocol to stop attacks on hacking. Certain manufacturers also have special encryption on their key fobs, that cannot be decoded with an ordinary program. You should only try this method if your previous experiences are with electronic devices. It is recommended to read the owner's manual of your vehicle or look up the manufacturer on the internet, since the steps differ based on vehicle type. Transponder chips Car keys with transponder chips require special reprogramming in order to function. Any hardware store can make you an entirely new car key, but the real challenge is in integrating it with your vehicle. The key has to be programmed to match the exact identification number of your vehicle, or else it won't be able to start. Transponder chips, which are used to prevent car theft, are a common feature of modern cars. The chip is a small microcircuit that transmits a radio-frequency signal when the ignition key is inserted. The car then recognizes the signal and begins the engine in case it matches the original signal that was programmed into the vehicle. The car is also programmed to stop when it detects an incorrect frequency. This makes it much harder for novice car thieves to connect a vehicle with hot wires and then start it. The key and the chip are connected via a circuit board that includes an induction coil. 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 then transmitted to the key's identification. The key's ID number is sent back to the vehicle, and if it is in line with the engine will start. There are many ways to program a transponder, but each requires a special tool. You can buy these tools online or at most automotive locksmiths. They are not cheap, but they're crucial for programming the chip in your vehicle. You could also use a reprogrammable key that was previously programmed for another vehicle. In this case, you'll need to make sure that the key has not been damaged or the transponder been altered in any way. You can read the chip with a scanner, or a computer with a USB connector. Reprogramming an transponder is a simple process, but requires specialized software. It also requires a scanner tool. If you're new to the process it is recommended to seek out the help of an auto locksmith. Also, avoid buying second-hand keys, since they're likely to be programmed and will not work with your vehicle. EZ Installer For decades, car owners who required replacement of their key fob had no other option than to go to a dealership to have their key electronically paired to the vehicle. This is because modern keys have to be “paired” to the vehicle of the owner in order to work and work, which required the use of expensive and complex equipment that only dealers had access to. The EZ Installer by Car Keys Express simplifies the process of pairing up modern keys to vehicles for retailers and locksmiths. The Easy Installer is a straightforward, “plug and play” OBD device that connects new keys with vehicles without the need for complex 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 instructions. The EZ Installer is compatible with all modern vehicles with proximity keys or push-button start. Go to the compatibility guide on Tom's website to determine whether your vehicle is compatible. If the device fails to program a remote or key purchased from Tom's into a vehicle that is compatible the full refund will be offered. 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 fees. It can be used for as long as a key professional or retailer wants. The EZ Installer eliminates the need for expensive monthly service contracts and software updates. This allows retailers to save money while giving their 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 duration of its life. Tools Locksmiths, auto mechanics and owners of vehicles can utilize car key programming tools to create new keys for cars. These tools communicate with a vehicle's immobilizer in order to program new keys and remotely controlled. These tools can be used to create duplicate keys and clone keys. These tools are an essential tool for anyone who owns a car. One of the most popular tools for programming car key s is the Autel Maxisys MS906BT. This scanner for vehicle diagnostics offers advanced OE-level features and is compatible with the majority of the major brands. It comes with a key programming feature that allows you to back up current key data. It is also capable of resetting the immobilizer as well as clearing immobilizer fault codes. Another essential tool for car key reprogramming is the OTOFIX Im1. This auto diagnostic scanner can read passwords for most major brands, and it comes with advanced OE-level features. It also allows online calibration, customization and reading EEPROM. The tool comes with an option that allows it to bypass a PIN code for BMW and Mercedes. It can also read EEPROMs, car MCUs, and CAN-EEPROMs for most major models. The Bidirectional scanner XToolUSA is a popular choice to reprogramme vehicles. This is a fantastic tool for auto repair shops as well as locksmiths as it can read key data and codes from the majority of vehicles in a matter of minutes. It also features an active test function that allows you to identify the problem quickly and effectively. There are a myriad of ways to reprogram your car, it is essential to select the appropriate tools and to be aware of how to make use of them. Incorrect programming may damage the vehicle's immobilizer and prevent it from beginning. Before you attempt to program your car key, it is recommended to consult a professional. Another option is to purchase the kit that comes with keys, a key programmer, remote control key, as well as transponder chips. This will ensure that you are equipped with all the tools you need to reprogram your car key. This process is more time-consuming and requires a basic understanding of soldering and electronic devices.