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Reprogramming Car Keys Transponder keys are believed to be more secure for cars and are more difficult to copy by thieves. However, a key may need to be reset when it becomes damaged or lost. You can reprogram your key fobs at home, however you must know the right process. To get the best results, you should have the following items: Keys Most modern cars require a transponder key to operate. This is a security feature and anti-theft protection. reprogram car key are programmed by a locksmith or authorized dealer to function with your car's systems and specific model. They can be costly to replace in the event of loss, so you should keep extras handy. You can find replacement key fobs in online stores and numerous brick-and-mortar auto shops. But how can you tell that the one you purchased is genuine? Are you able to tell if it has been programmed for another car or if it could be reprogrammed for yours? If you are planning to program a new key the first step is to ensure that your vehicle is on and running. Insert the key you want to reprogram into the ignition, but do not turn it. There are only a few seconds left before the system will reset all commands and then exits the programming mode. Therefore, it is important to move fast and not wait between steps. To avoid this happening, shut off the engine. Turn the key from “on” to “off” to test the system. The door locks should cycle and you'll hear a sound that indicates that the procedure was successful. Certain newer vehicles have rolling key technology, which keeps thieves from using stolen cars' key to start it. This feature is still susceptible to a technique known as replay attack. It allows thieves to record and later reproduce the signal from the car key fob to unlock the car. To counter this, manufacturers have introduced an additional security feature known as the CAN bus protocol to thwart attacks on hacking. Certain manufacturers also have special encryption on their key fobs which cannot be decoded by an easy program. It is best to only attempt this process if your experience is with electronic devices. Refer to the manual for your car or look up the manufacturer's website for information on how to program it. The steps are different depending on the type of vehicle. Transponder chips Car keys that feature transponder chips need special reconfiguration to work. Any hardware store can make you an entirely new car key, however the real challenge lies in integrating it with your car. The key has to be programmed to match the exact identification number of your car, otherwise it won't start. Transponder chips, used to prevent car theft are a standard feature of modern automobiles. The chip is a tiny microcircuit that emits a radio frequency signal when the ignition key is put in. The car detects the signal and starts the engine only if the signal is in line with the original one that was programmed into the vehicle. The car will also shut down if the frequency is not valid. This makes it harder for novice car thefts to hot-wire a vehicle and then turn it on. The chip and the key 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 produces a signal which is absorbed by the coil, which then transmits it to key's identification number. The key's identification code is transmitted back to the car and the engine will start when the identification number matches. There are many methods to program a key transponder, however each requires a special tool. You can buy these tools online or from most locksmiths in the automotive industry. These tools are not expensive, but they are essential to program your car's chip. You may also utilize a transponder that is reprogrammable that has been previously programmed for a different vehicle. In this case you'll need to make sure that the key is not damaged or the transponder has been altered in any way. To do this, you'll need scanners or computers with an USB port to read the chip and determine its identity. Reprogramming an transponder is a simple procedure, but it requires specific software. It also requires the use of a scanner. If you're a beginner it is recommended to seek out the help of an auto locksmith. Avoid buying used keys because they could already be programmed and will not be compatible with your vehicle. EZ Installer For a long time, owners of cars who required replacement of their key fob had no other option than to go to an auto dealer to have their key electronically linked to their vehicle. This is because, in order to make modern keys work they have to be “paired”. This required expensive and complex equipment that was available only to dealers. The EZ Installer from Car Keys Express solves this problem for locksmiths and retailers by making it easier for connecting modern keys to vehicles. The EZ Installer, a basic “plug-and-play” OBD device, pairs new keys with vehicles without the need for complicated equipment or tokens to facilitate programming. It connects directly to the standard OBD port on the vehicle, and runs an application that is mobile that provides easy-to-follow instructions. The EZ Installer is compatible with the majority of newer models that include proximity keys or push button start. To determine if it'll work with a specific vehicle, refer to the compatibility guidelines on Tom's site. If the device fails to program the remote or key purchased from Tom's into a vehicle compatible the full refund will be available. Contrary to conventional programming equipment that costs key professionals thousands of dollars with typical per-key “token” fees, the EZ Installer Pro doesn't charge any fees which means it can be used for as long as a retailer or key professional would like to keep it. The EZ Installer eliminates the need for expensive monthly service contracts and software updates. This lets retailers save money while offering their customers the same top quality service as OEM equipment. It also comes with 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 vehicles. 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 invaluable tool for anyone who has a vehicle. Autel Maxisys MS906BT is one of the most popular tools to program keys for cars. This scanner for vehicle diagnostics offers advanced OE-level features and is compatible with the majority of the major brands. It also includes a key programming function and the ability to save current important information. It can also reset the immobilizer, or clear the fault code. Another important tool for reprogramming car keys is the OTOFIX IM1. This auto diagnostic scanner comes with 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 EEPROM. The program also has a feature to bypass the BMW or Mercedes PIN code. It also has the ability to read EEPROM, car MCU and CAN EEPROM 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 within a few seconds which makes it a perfect tool for auto shops as well as locksmiths. It also comes with a live test function that can help identify the problem quickly and effectively. There are a variety of ways to reprogram your car, it is essential to select the appropriate tools and know how to utilize them. A mistake in programming could cause damage to the car's immobilizer system, and may prevent it from starting. Before attempting to reprogram your car's key, it is recommended to consult a professional. Another option is to buy the kit that comes with keys, a key programmer, remote control keys, and transponder chips. This will ensure that you have everything you need to reprogram your car key. However, this method will take longer and requires some knowledge of electronics and soldering.