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Reprogramming Car Keys Transponder keys are said to be more secure for cars and harder to copy by thieves. However, a key may need to be reset if it becomes damaged or lost. You can change the programming of your key fobs at home, but you need to be aware of the correct procedure. For the best results, you must have the following items: Keys Most modern cars require a transponder key to operate. This gives security and protection against theft. The keys are programmed by a locksmith or an authorized dealer to function with your car's systems and the specific model. It is expensive to replace them if they are lost, so it's a good idea to have spares in your possession. You can also find replacement keys fobs in various online stores and in a variety of brick-and-mortar automotive shops. How can you be sure that the one you purchased is authentic? Can you tell whether it has been programmed for another car or if it could be reprogrammed for yours? To program a new car key first make sure that your vehicle is running. Insert the key you want to reprogram into the ignition without turning it. There are just a few minutes before the system will reset all commands and leaves the programming mode. It is important that you move quickly and don't be patient between each step. Shut off the engine to stop this. You can check the car's security system by turning the key to the “on” position and then back to the “off” position. You should hear a sound to indicate that the process was successful. The door locks will cycle. Some newer cars use a rolling key technology, which prevents thieves from using stolen cars' key to open it. The technology is still susceptible to a technique dubbed replay attack which allows thieves to record the signal from the key fob of the car and then replicate it to open the car. To combat this, manufacturers added a security feature known as the CAN bus protocols to ward off hacking. Certain manufacturers also employ special encryption on their key fobs, that cannot be decoded with an ordinary program. These types of cars require programming by a professional, and you should only attempt this procedure if you have experience working with electronic devices. Check the manual of your car or look up the website of the manufacturer to learn how to program it. The steps to follow will differ according to the type of vehicle. Transponder chips Transponder chip car keys require special reprogramming in order to function. Any hardware store can offer you a new car key, however the real challenge lies in integrating it with your vehicle. The key you reprogrammed needs to be matched with the specific identification number of your vehicle, or it won't start the engine. Transponder chips, which are used to stop theft of cars, are a common feature of modern automobiles. The chip is a microcircuit that emits a radio frequency signal when the key is inserted in the ignition. The car is able to detect the signal and starts the engine only if the signal is in line with the one programmed in the vehicle. The vehicle is also programmed to stop when it detects an incompatible frequency. This makes it much harder for car thieves with no experience to wire a vehicle and then start it. The chip and the key are connected via a circuit board that includes an induction coil. When the key is put in the ignition, a magnetic field is created around the transponder. This creates a signal which is received by the coil and then transmitted to the key identification number. The ID number of the key is sent back to the vehicle, and if it is in line with the engine will begin to run. There are a variety of ways to program a key transponder, but all require the use of a specific tool. These tools can be purchased through the internet or from many automotive locksmiths. They are not cheap, but they're essential for programming the chip to your vehicle. You may also use a unreprogrammable key that was programmed for another vehicle. In this case, make sure that the key has not been damaged or the transponder has not been altered in any way. You can read the chip by using a scanner or a computer with an USB connector. 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. You should also avoid buying second-hand keys as they're likely to be programmed and will not be compatible with your car. EZ Installer In the past the time when car owners wanted to replace their keys were required to go to an agent to have it electronically paired with the vehicle. This is because modern keys have to be “paired” to a specific vehicle to work, which required expensive and complicated equipment that only dealers had access to. The EZ Installer by Car Keys Express simplifies the process of pairing modern keys with vehicles used by retailers and locksmiths. The Easy Installer is a straightforward, “plug and play” OBD device that pairs new keys to vehicles, without the need for complex equipment or programming tokens. It connects directly to the standard OBD port on the vehicle, and runs an app that can be downloaded on mobile devices to provide simple to follow instructions. The EZ Installer is compatible with most newer models, including those 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. 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. In contrast to traditional programming equipment that costs retailers and key professionals thousands of dollars in typical per-key “token” fees, the EZ Installer Pro doesn't charge any fees and can be used as long as a retailer or key professional wishes to keep it. The EZ Installer also eliminates the necessity for expensive monthly service contracts and updates, meaning that it could reduce costs for retailers while offering customers the same high-quality service as OEM equipment. It also comes with an industry-leading warranty that covers all hardware and software for the duration of its life. Tools Car key programming tools can be used by auto technicians, locksmiths and owners of vehicles to program new keys for their vehicles. These tools connect to the immobilizer of the vehicle to program new keys and remote controls. These tools can be used to make duplicate keys and clone keys. These tools are an essential tool for anyone who owns a vehicle. One of the most popular car key programming tools is the Autel Maxisys MS906BT. This vehicle diagnostic scanner provides advanced features OE-level and is compatible with the majority of the top brands. It also includes an option for key programming and can backup the most recent key information. It also resets the immobilizer or erase the fault code. The OTOFIX Im1 is an important tool for reprogramming car keys. This auto diagnostic scanner has advanced functions comparable to OE and can read passwords from the majority of major brands. It can also perform online calibration, customization, and reading EEPROM. It also comes with a feature that allows it to bypass the PIN code for BMW and Mercedes. It also has the ability to read EEPROM, car MCU, and CAN EEPROMs for all major models. The Bidirectional scanner XToolUSA is a popular option for reprogramming vehicles. It can read key information and codes from most vehicles in a few seconds which makes it a perfect tool for auto shops and locksmiths. It also features an active test function that can help find the issue quickly and efficiently. There are a myriad of ways to reprogram your car. It is crucial to have the proper tools, and to know how they function. Incorrect programming can cause damage to the car's immobilizer system and stop it from starting. It is recommended to seek advice from a professional prior to attempting to reprogram a car key. You can also purchase a kit which includes a key programmer, remote control key, and transponder chip. This will ensure that you're equipped with all the tools you require to reprogram your car's key. This method takes longer and requires knowledge of soldering and electronic devices.