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Reprogramming Car Keys Transponder keys are thought to be more secure for cars and harder to copy by thieves. However, keys may need to be reset in the event that it is damaged or lost. You can program key fobs yourself however, you must be aware of the proper procedure. For the best results you'll need the following items: Keys Most modern vehicles require some kind of transponder key or fob in order to operate, providing security and protection against theft. The keys have to be programmed to the specific vehicle and its features by a certified locksmith or dealer. They are costly to replace if they are lost, so it is recommended to keep spare keys in the car. You can also find replacement key fobs at various online stores and in a variety of brick-and-mortar automotive shops. How can you be sure that the one you bought is genuine? Do you know if the unit has been programmed to work with another vehicle or if yours can be reprogrammed? If you are planning to program an entirely new key first, you need to ensure that your vehicle is running. Insert the key you want to program into the ignition, but do not turn it. There are just a few minutes before the system resets all commands and exits the programming mode. It is essential to move quickly and don't be patient between each step. To avoid this happening, turn off the engine. Switch the key from “on” to “off” to test the system. car key programming should cycle, and you'll hear a chime signalling that the process has been successful. Certain cars with more modern technology have rolling key technology, which keeps thieves from using a stolen vehicle's key to open it. The technology is still susceptible to a technique known as a replay attack, which allows thieves to record the signal from the key fob of the car and reproduce it later to open the car. To prevent this, manufacturers have introduced a security feature called CAN bus protocol to stop attacks on hacking. Certain manufacturers also employ special encryption on their key fobs that cannot be decoded with an easy program. You should only try this method if your previous experiences are with electronic devices. It's a good idea to read your car's owner manual or look up the manufacturer online, as these steps vary by vehicle model. Transponder chips Car keys that feature transponder chips need special programming to function. While any hardware store can cut a new key for you, the real challenge is making it function with your specific car. A key that has been reprogrammed will need to be compatible with the exact identification number of the vehicle or else it won't be able to start the engine. Transponder chips, which are used to protect cars from theft are a standard feature of modern cars. The chip is a microcircuit which transmits a radio frequency signal when the key is put in the ignition. The car then recognizes the signal and begins the engine in case it matches the original frequency that was programmed into the vehicle. The car will also shut down if a frequency is not valid. This makes it much more difficult for car thieves with no experience to wire a vehicle and start it. The key and the chip are connected via a circuit board that includes an induction coil. When the key is put in the ignition it creates a magnetic field generated around the transponder. This produces a signal which gets amplified by the coil which sends it to the key's identification number. The key's identification code is returned to the car, and the engine starts when the identification number matches. There are a variety of ways to program a key transponder, however all of them require the use of a specific tool. These tools can be purchased through the internet or from many automotive locksmiths. These tools are not expensive, but they are essential for programming the chip in your car. You can also use an resettable key that was programmed for another vehicle. In this scenario, make sure that the key has not been damaged or the transponder has not been altered in any way. The chip can be read using a scanner, or a computer equipped with an USB connector. The process of reprogramming a transponder key is quite easy, but it will require an expertly designed software and scan tool. If you're a beginner you should seek out the help of an auto locksmith. Don't buy used keys since they could already be programmed, and they won't work with your car. EZ Installer Prior to recently those who wanted to replace their key fob had to go to a dealer to have it electronically paired with the vehicle. This is because in order to make modern keys function 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 up modern keys with vehicles for locksmiths and retailers. The EZ Installer is a basic, “plug and play” OBD device that connects new keys to vehicles without the need for complex equipment or programming tokens. It connects directly to the standard OBD port of the vehicle and uses an app that can be downloaded on mobile devices to provide simple to follow instructions. The EZ Installer works with most modern vehicles with proximity keys or push-button start. To see if it will work with a specific vehicle, check the compatibility guide on the Tom's website. If the device fails to program a remote or key purchased from Tom's into a compatible vehicle, a full refund is available. Contrary to conventional programming equipment which can cost key 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 the key professional or retailer needs. The EZ Installer eliminates the need for costly monthly service contracts and software updates. This lets retailers 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 life of the product. Tools Car key programming tools can be used by locksmiths, auto technicians and even owners of vehicles to programme new keys for their vehicles. These tools connect to the vehicle's immobilizer system to create new keys and remote controls. They can also be used to clone existing keys and create duplicate keys. These tools are a useful tool for those who own a car. Autel Maxisys MS906BT is among the most popular tools for programming car keys. This vehicle diagnostic scanner offers advanced OE-level features and is compatible with the majority of the top brands. It has a key programming feature that can backup current key data. It is also capable of resetting the immobilizer as well as clearing immobilizer fault codes. Another important tool for reprogramming car keys is the OTOFIX IM1. This auto diagnostic scanner has advanced functions comparable to OE and can read passwords from all major brands. It also has the ability to perform online calibration, customization, and reading of EEPROM. It also comes with a feature 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 XToolUSA Bidirectional Scanner is another option for reprogramming cars. This is a wonderful tool for auto repair shops as well as locksmiths as it can read codes and key data from most vehicles within seconds. It also features an active test function that allows you to identify the problem quickly and efficiently. There are a variety of ways to modify the car's programming. It is essential to have the proper tools and to understand how they work. Uncorrect programming can cause damage to the immobilizer on the vehicle and prevent it from starting. It is best to seek advice from a professional prior to trying to reprogram a car key. 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 have everything you need to reprogram your car key. This method takes longer and requires expertise in soldering and electronic devices.