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Reprogramming Car Keys Transponder keys are believed to be more secure for cars and harder to copy by thieves. However, a key may need to be reprogrammed when it becomes damaged or lost. You can reprogram your key fobs at home, however you need to be aware of the correct procedure. For the best results, you'll need the following items: Keys Most modern vehicles require a transponder key or fob in order to operate, providing security and anti-theft protection. The keys must be programmed to your specific vehicle and its features by a licensed dealer or locksmith. They are expensive to replace if lost, so you should keep extras handy. You can find key fobs to replace them in online stores and numerous brick-and-mortar auto shops. How can you ensure that the one you bought is genuine? Can you tell whether the unit has been programmed to work with another vehicle, or if it can be reprogrammed? If you want to program an entirely new key, the first step is to ensure that your car is running. Insert the key you want to reprogramme into your ignition, but don't turn it. There are only a few seconds before the system will reset all commands and then exits the programming mode. It is essential to be quick and don't wait between each step. Stop the engine to prevent this. You can test the car's system by turning the key to the “on” position, then back to the “off” position. The door locks should cycle and you'll hear a chime to indicate that the procedure was successful. Certain vehicles of recent years use rolling key technology to prevent thieves from using stolen keys to open the vehicle. This feature is still vulnerable to a technique dubbed replay attack. It allows thieves to record and later reproduce the signal from the car key fob to unlock the car. To stop this, manufacturers have added a security feature called the CAN bus protocol to thwart attacks on hacking. Some manufacturers use a special encryption on their keys, which can't be decoded with an ordinary program. You should only try this process if your experience is in electronics. It is recommended to read the owner's manual of your vehicle or look up the manufacturer on the internet, since these steps vary by vehicle model. Transponder chips Transponder chip car keys require a specific reprogramming to work. While any hardware store can cut a new key for you, the real problem is to make it work in conjunction with your particular car. The key has to be programmed to match the exact identification number of your vehicle, or else it won't start. Transponder chips, used to prevent car theft are a standard feature of modern automobiles. The chip is a microcircuit that transmits a radio frequency signals when the key is inserted in the ignition. The car can detect the signal and starts the engine only if the signal matches the original that was programmed in the vehicle. The car also shuts down if a frequency is invalid. This makes it more difficult for novice car thefts to wire a vehicle hot and then turn it on. The key and the chip are connected by an electronic circuit board that contains an induction coil. When the key is inserted into the ignition, it creates an electric field around the transponder. This produces a signal which is absorbed by the coil, which then transmits it to key's identification number. The key's ID number is sent back to the vehicle, and if it matches, the engine will begin to run. There are many methods to program a transponder keys, but they all involve using a special tool. You can buy these tools online or at most locksmiths for cars. They are not cheap, but they are vital for programming the chip to your vehicle. You could also use a 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 with a scanner, or a computer equipped with an USB connector. The process of reprogramming the transponder key is simple, however it requires special software and a scanning tool. It is recommended to contact an auto locksmith for assistance for those who are new to the process. Don't buy used keys since they might already be programmed, and they won't work with your vehicle. EZ Installer For decades, car owners who needed to replace their key fob had no alternative than to visit a dealership to get their key paired to the vehicle. This is because modern keys need to be “paired” to a specific vehicle to work, which required expensive and complicated equipment that only dealers could access. The EZ Installer by Car Keys Express simplifies the process of pairing modern keys to vehicles for retailers and locksmiths. The EZ Installer, a simple “plug-and-play” OBD device, connects new keys to vehicles without the need for complicated equipment or tokens for programming. It connects directly to the standard OBD port of the vehicle and uses an app that can be downloaded on mobile devices that provides easy-to-follow 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 a remote or a key purchased from Tom's into a compatible vehicle, a full refund is available. Contrary to conventional programming equipment that costs retailers and key professionals thousands of dollars with typical per-key “token” fees, the EZ Installer Pro doesn't charge these fees at all and can be used for as long as a retailer or key professional wants it to be. The EZ Installer also eliminates the need for costly monthly service contracts and updates, meaning that it could save retailers money while still providing customers with the same high-quality service as OEM equipment. It also comes with a renowned warranty that covers hardware and software for the duration of your life. You can also learn more about Locksmiths, auto mechanics and even owners of vehicles can use car key programming tools to create new keys for vehicles. These tools communicate with the vehicle's immobilizer to program new keys, and are remotely controlled. These tools can be used to make duplicate keys and to make keys cloned. These tools are a valuable tool for anyone who has a vehicle. One of the most admired car key programming tools is the Autel Maxisys MS906BT. The scanner for diagnostics of vehicles provides advanced features OE-level and is compatible with the majority of the top brands. It has an important programming feature and can backup current key data. It can also reset the immobilizer or clear 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 the majority of major brands. It is also able to perform online calibration and customization as well as reading of EEPROM. The tool is also equipped with a feature that allows it to bypass a PIN code for BMW and Mercedes. It also has the ability to read EEPROMs, car MCUs, and CAN-EEPROMs of all major models. The XToolUSA bidirectional scanner is another popular choice for reprogramming vehicles. It can read key information and codes from most vehicles in just a few seconds, making it a great tool for auto shops as well as locksmiths. It also has an active test feature that allows you to find the problem quickly. There are a myriad of ways to reprogram a car, it is important to use the right tools and to know how to use them. A mistake in programming could damage the vehicle's immobilizer and stop it from starting. Before you attempt to program your car key, it is best to seek advice from a professional. You can purchase a kit that includes keys, a key programmer, remote control key and transponder chip. This will help ensure that you have everything you need to reprogram your car key. This method takes longer and requires expertise in soldering and electronic devices.