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Reprogramming Car Keys Transponder keys are thought to be more secure for cars and are more difficult to copy by thieves. The key could need to be programmed again in the event that it is damaged or lost. You can change the key fobs you own however, you must be aware of the proper procedure. You should have these items to ensure the best results: Keys Most modern vehicles require a transponder key or fob in order to operate, ensuring security and protection against theft. The keys are programmed by a locksmith or an authorized dealer to function with your car's system and specific model. They are expensive to replace in the event of loss, so it is recommended to keep spare keys in the car. You can purchase key fobs to replace them in online stores and many brick and mortar auto shops. How can you be sure that the one you bought is genuine? Are you able to tell whether it was programmed for another car or if it could be programmed to work with your car? To program a new car keys, you must first verify that your vehicle is operating. Insert the key you want to reprogramme into your ignition, but do not turn it. You only have a couple of seconds before the car's system resets the commands and then exits programming mode. It is important that you move quickly and do not wait between each step. To prevent this from happening, shut off the engine. Turn the key from “on” to “off” to test the system. The door locks should cycle and you will hear a chime signalling that the process has been successful. Certain newer vehicles have rolling key system, which stops thieves from using a stolen car's key to start it. This feature is still vulnerable to a technique known as 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 introduced the 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 attempt this method if your previous experience is with electronic devices. It is a good idea to consult your car's owner manual or search for the manufacturer online, as the steps will differ depending on the car model. Transponder chips Car keys that feature transponder chips require special reconfiguration to work. While any hardware store can cut a new key for you, the biggest issue is how to integrate it with your specific car. The key must be programmed to match the exact identification number on your car, or else it won't start. Transponder chips are a common feature of modern cars and are designed to stop car theft. The chip is a tiny microcircuit which transmits a radio-frequency signal when the ignition key is put in. The car detects the signal and begins the engine only if it matches the original one that was programmed into the vehicle. The car also shuts down if the frequency is not valid. This makes it much more difficult for thieves who are not experienced to hot wire a vehicle and then start it. A circuit board with an induction coil that connects the key to the chip. When the key is placed in the ignition it creates a magnetic field around the transponder. This generates a signal that is absorbed by the coil before being sent to the key's identification number. The key's ID number is transmitted back to the vehicle, and if it matches, the engine will begin to run. There are many ways to program a key transponder, however all require the use of a specific tool. These tools can be purchased through the internet or from many automotive locksmiths. They're not cheap, but they are essential for programming the chip to your car. You may also use a reprogrammable transponder key that has been previously programmed for another 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. To check this, you'll need scanners or a computer with a USB port to read the chip and determine its identity. The process of reprogramming an transponder's key is easy, but it will require specialized software and a scan tool. It is recommended to contact an auto locksmith for assistance if you're a novice. You should also avoid buying secondhand keys, as they're probably already programmed and will not work with your vehicle. EZ Installer Until recently the time when car owners wanted to replace their key fob had to visit a dealer to have it electronically paired with the vehicle. This is because modern keys require to be “paired” to a specific vehicle to function and work, 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 retailers and locksmiths. The EZ Installer is a simple, “plug and play” OBD device that pairs new keys to vehicles, without the need for complicated equipment or programming tokens. It connects directly to the standard OBD port on the vehicle and utilizes an app that can be downloaded on mobile devices that provides easy-to-follow instructions. The EZ Installer works with a wide range of modern vehicles that include proximity keys or push-button start. Check automotive key programming at Tom's website to determine if your vehicle is compatible. A full-money-back guarantee is provided if the device does not successfully program a remote or key purchased from Tom's for a vehicle compatible. Contrary to conventional 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 costs. It is able to be used for as long as the key professional or retailer requires. The EZ Installer also eliminates the need for costly monthly service contracts and updates, meaning that it can reduce costs for retailers while offering customers the same high-quality service as OEM equipment. It also offers an industry-leading warranty that includes all software and hardware for life. Tools Locksmiths, auto mechanics, and even owners of vehicles can use car key programming tools to program 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 clone existing keys and create duplicate keys. These tools are a valuable tool for those who own a car. Autel Maxisys MS906BT is one of the most well-known tools to program keys for cars. The scanner for diagnostics of vehicles is compatible with all major brands and offers advanced OE features. It comes with an important programming feature that can backup the current key information. It is also capable of resetting the immobilizer as well as clearing immobilizer fault codes. The OTOFIX IM1 is an important tool for reprogramming keys for cars. This auto diagnostic scanner can read passwords from all major brands and comes with advanced OE-level features. It also has the ability to perform online calibration, customization, and reading EEPROM. The tool also has an option to bypass the BMW or Mercedes PIN code. It also has the ability to read EEPROMs, car MCUs and CAN-EEPROMs for most major models. The XToolUSA Bidirectional Scanner is another popular choice for reprogramming vehicles. This scanner 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 comes with a live test function that can help determine the cause quickly and efficiently. There are a variety of ways to modify the car's programming. It is important to have the proper tools, and also to know how they function. A mistake in programming could cause damage to the vehicle's immobilizer system, and may prevent it from starting. Before you attempt to reprogram your car key, it's best to consult with an expert. Another option is to buy a kit that includes the key programmer, a remote control key, and transponder chips. This will ensure that you have everything you need to reprogram your car key. This process is more time-consuming and requires expertise in soldering and electronic devices.