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Reprogramming Car Keys Transponder keys are thought to be more secure for vehicles and more difficult to copy by thieves. However, keys may need to be reprogrammed when it becomes damaged or lost. You can change the key fobs you own, but you must know the correct process. For the best results you should have the following items: Keys Most modern vehicles require a transponder key or fob in order to operate, ensuring security and anti-theft protection. The keys are programmed by a locksmith or authorized dealer to work with your car's system and specific model. They are costly to replace in the event of loss, so you should have spares in your car. You can also find replacement key fobs on various websites and in many brick-and-mortar auto shops. How can you ensure that the one you purchased is authentic? Can you tell whether the unit has been programmed to work with a different 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 operating. Insert the key that you'd like to reprogramme into your ignition, but do not turn it. You will only have just a few seconds before the car's system resets the commands and leaves programming mode. This is why it is important to move quickly and not pause between steps. Stop the engine to prevent this. Turn the key from “on” to “off” to test the system. You should hear a sound signalling that the procedure was successful. The door locks will be able to cycle. Certain newer vehicles utilize rolling key technology to prevent thieves from using stolen keys to open the vehicle. The technology is still susceptible to a technique known as replay attack that allows thieves to record the signal from the key fob on the vehicle and then replicate it to open the car. To prevent this, manufacturers have added a security feature called the CAN bus protocol to thwart attacks on hacking. Certain manufacturers also have special encryption on their key fobs which cannot be decoded by a simple program. These kinds of cars require programming by a professional, and you should only attempt this procedure only if you've worked with electronic devices. It is recommended to read the owner's manual for your car or look up the manufacturer on the internet, since the steps will differ depending on the vehicle model. Transponder chips Car keys with transponder chips require special programming to function. Any hardware store can offer you an entirely new car key, however the real challenge lies in implementing it to your car. The key must be programmed to match the exact identification number of your vehicle, or else it will not start. Transponder chips, which are used to stop theft of cars, are a common feature of modern cars. The chip is a tiny microcircuit that transmits a radio-frequency signal when the ignition key is put in. The car then recognizes the signal and then starts the engine if it is in line with the original one that was programmed into the vehicle. The car also shuts down if the frequency is not valid. This makes it difficult for novice car thefts to hot-wire a vehicle and then start it. The key and the chip are connected by an electronic circuit board that contains an induction coil. When the key is placed in the ignition the magnetic field is generated around the transponder. This generates a signal that is taken up by the coil before being sent to the key identification number. The key's identification code is transmitted back to the car, and the engine starts when the identification number is in line with. There are many ways to program a key transponder, but all require the use of a specific tool. These tools can be purchased online or from most automotive locksmiths. They are not cheap, but they are vital for programming the chip into your vehicle. You can also use an reprogrammable key that was previously programmed for an alternative vehicle. In this scenario you'll need to make sure that the key has not been damaged or that the transponder has been altered in any way. The chip can be read using a scanner, or a computer equipped with an USB connector. Reprogramming a transponder key is quite easy, but it will require specialized software and a scan tool. If you're new to the process it is recommended to seek help from an auto locksmith. You should also avoid buying second-hand keys, since they are likely already programmed and will not be compatible with your car. EZ Installer Until recently those who wanted to replace their keys were required to go to a dealer to have it electronically linked to the vehicle. This is because modern keys require to be “paired” to the vehicle of the owner in order to function, which required the use of expensive and complex equipment that only dealers could access. 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 simple, “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 using a mobile app to provide easy-to-follow instructions. The EZ Installer is compatible with most newer vehicles that have proximity keys or push button start. To see if it will be compatible with your specific vehicle, check the compatibility guidelines on Tom's site. If the device fails to program a remote or a key purchased from Tom's into a vehicle compatible the full refund will be offered. Unlike traditional programming equipment, which can cost key professionals tens of thousands of dollars in “token” fees per key, the EZ Installer Pro does not charge these costs. It is able to be used for as long as the key professional or retailer needs. The EZ Installer eliminates the need for expensive monthly service contracts and software updates. This lets retailers save money while providing their customers the same high quality service as OEM equipment. It also offers a leading warranty that covers both hardware and software for the rest of your life. You can also find out more about Locksmiths, auto mechanics, and vehicle owners can use car key programming tools to create new keys for cars. These tools communicate with the vehicle's immobilizer in order to program new keys and control them remotely. They can also be used to copy existing keys and create duplicate keys. These tools are an essential tool for anyone who owns a car. One of the most admired tools for programming car key s is the Autel Maxisys MS906BT. The scanner for diagnostics of vehicles offers advanced OE-level features and is compatible with all of the major brands. It features a key programming feature and can back up current key data. It also resets the immobilizer or clear immobilizer fault codes. Another tool that is essential for car key reprogramming is the OTOFIX Im1. This auto diagnostic scanner can read passwords from all major brands and has advanced OE-level features. It also performs online calibration as well as customization and reading of EEPROM. It also comes with a feature to bypass a BMW or Mercedes PIN code. It can also read EEPROMs, car MCUs, and CAN-EEPROMs for most major models. The bidirectional scanner XToolUSA is another popular choice to reprogramme vehicles. This scanner can read codes and key information from most vehicles in just a few seconds, making it a great tool for auto shops and locksmiths. It also comes with a live test function that helps find the issue quickly and efficiently. There are a variety of ways to reprogram a car it is essential to select the appropriate tools and to be aware of how to utilize them. Incorrect programming could cause damage to the car's immobilizer system and stop it from working. It is advised to consult a professional before trying to reprogram your car key. Another option is to purchase a kit that includes 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 is more time-consuming and requires expertise in soldering and electronics.