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Reprogramming Car Keys Transponder keys for car keys are thought to keep cars more secure and are less likely to be duplicated by thieves. However, a key might need to be reprogrammed when it becomes damaged or lost. You can change the key fobs you own, but you must know the correct procedure. For the best results you should have the following items: Keys The majority of modern vehicles require a transponder keys to operate. This gives security and protection against theft. These keys are programmed by a locksmith or an authorized dealer to function with the car's systems and the specific model. They can be costly to replace in the event of loss therefore, you should keep extras handy. You can also find replacement key fobs at various online stores and in many brick-and-mortar auto shops. How can you be sure that the one you purchased is genuine? Can you tell whether it was programmed for another car or if it is able to be programmed to work with your car? To program a new car key first make sure that your vehicle is running. Insert the key you wish to program into the ignition, but do not turn it. There are just a few minutes before the system resets all commands and then exits the programming mode. It is important that you move quickly and don't be patient between each step. Turn off the engine to prevent this. You can check the system of your car by turning the key to the “on” position, then back to the “off” position. You should hear a sound to indicate that the process was successful. The door locks will cycle. Certain newer vehicles utilize rolling key technology to prevent thieves from using stolen keys to open the vehicle. This feature is still vulnerable to a method known as replay attack that allows thieves to record the signal of the vehicle's key fob, then reproduce it to open the car. To prevent this, manufacturers have added the security feature known as the CAN bus protocols to stop hackers from gaining access to the vehicle. Certain manufacturers also employ special encryption on their key fobs which cannot be decoded by a simple program. These types of vehicles will need to be programmed by a professional. Therefore, you should only attempt this process if you have experience working with electronics. It's a good idea to read the owner's manual of your vehicle or search for the manufacturer on the internet, since the steps differ based on vehicle type. Transponder chips Transponder chip car keys require special reprogramming in order to function. While any hardware store can cut keys for you, the biggest problem is to make it work with your specific car. The key you reprogrammed needs to be compatible with the exact identification number of your car, or it won't start the engine. automotive key programming are a standard feature in modern cars and are designed to stop car theft. The chip is a microcircuit that transmits a radio frequency signals when the key is put into the ignition. The car is able to detect the signal and begins the engine only if the signal is in line with the one programmed in the vehicle. The vehicle is also programmed to shut down if it detects an invalid frequency. This makes it much harder for car thieves with no experience to wire a vehicle and then start it. A circuit board that has an induction coil that connects the chip to the key. When the key is inserted into the ignition it creates an electric field around the transponder. This creates a signal which is absorbed by the coil and sent to the key's identification. The key's identification code is transmitted back to the car, and the engine starts when the identification number matches. There are a variety of ways to program a transponder, however all of them require the use of a specific tool. These tools can be purchased on the internet or at most auto locksmiths. They are not cheap, but they are vital for programming the chip to your vehicle. You may also use a reprogrammable transponder key that has been previously programmed for another vehicle. In this case, you'll need to make sure that the key isn't damaged or that the transponder has been altered in any way. To do this, you'll need a scanner or a computer with an USB port to scan the chip and determine its identity. The process of reprogramming a transponder key is quite simple, but it requires an expertly designed software and scan tool. It's best to ask an auto locksmith for help if you're a novice. Avoid buying used keys as they might already be programmed and will not work with your car. EZ Installer Prior to recently the time when car owners 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 modern keys with vehicles used by retailers and locksmiths. The EZ Installer, a basic “plug-and-play” OBD device, pairs new keys with vehicles without the use of complicated equipment or tokens to facilitate programming. It connects directly to the standard OBD port on the vehicle and utilizes a mobile application to provide simple to follow instructions. The EZ Installer is compatible with the majority of newer models that have proximity keys or push button start. Go to the compatibility guide on Tom's website to determine if your vehicle is compatible. A full-money-back guarantee is provided in the event that the device cannot successfully program a key or remote purchased from Tom's for a vehicle compatible. Unlike traditional programming equipment, which costs key retailers and professionals tens of thousands of dollars in “token” fees per key, the EZ Installer Pro does not charge these fees. It is able to be used as long as a key professional or retailer requires. The EZ Installer eliminates the need for costly monthly service contracts and software updates. This allows retailers to save money while giving 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. Tools Locksmiths, auto mechanics, and vehicle owners can use car key programming tools to create new keys for cars. These tools communicate with a vehicle's immobilizer in order to program new keys and remotely controlled. They can also be used to copy existing keys and create duplicate keys. These tools are a valuable tool for anyone who owns an automobile. One of the most admired tools for programming keys to cars is the Autel Maxisys MS906BT. This scanner for vehicle diagnostics is compatible with all major brands and offers advanced OE features. It has an important programming feature and can backup current key data. It is also capable of resetting the immobilizer and 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 of EEPROM. The program also has a feature to bypass the BMW or Mercedes PIN code. It can also read EEPROMs, car MCUs and CAN-EEPROMs for all major models. The bidirectional scanner XToolUSA is another popular option for reprogramming vehicles. This tool can read key information and codes from most vehicles in just 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 allows you to find the issue quickly and efficiently. There are a myriad of ways to reprogram your car. It is important to have the right tools, and to know how they work. Incorrect programming may cause damage to the immobilizer of the vehicle and prevent it from beginning. It is advised to seek advice from a professional prior to trying to reprogram your car key. Another option is to purchase a kit that includes a key programmer, remote control key, and transponder chips. This will ensure that you have everything you need to reprogram your car key. However, this process takes longer and requires a basic understanding of electronic circuits and soldering.