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Reprogramming Car Keys Car keys with transponders are believed to make cars more secure and are harder for thieves to duplicate. However, a key might require reprogramming when it becomes damaged or lost. You can change the programming of your key fobs at home, but you must know the right process. For the best results you'll need the following items: Keys Most modern vehicles require a transponder fob or transponder keys to operate, providing security and anti-theft protection. The keys have to be programmed to your specific vehicle and its features by an authorized dealer or locksmith. They are costly to replace if they are lost therefore, you should keep extras handy. You can locate replacement key fobs in online stores as well as many brick-and mortar auto shops. How do you ensure that the one you purchased is authentic? Can you tell whether it has been programmed for another car or if it can be programmed to work with your car? If you want to program a new key the first step is to ensure that your vehicle is running. Insert the key you want to program into the ignition, but don't turn it. You will only have just a few seconds before the car's system resets commands and then exits programming mode. Therefore, it is essential to move quickly and not pause between steps. Turn off the engine to avoid this. You can test the car's system by turning the key to the “on” position, then back to the “off” position. You should hear a sound signalling that the procedure was successful. The door locks will be able to cycle. Certain newer vehicles have rolling key technology, which prevents thieves from using stolen cars' key to start it. This feature is still vulnerable to a technique known as replay attack. car key cut and programed allows thieves to record and duplicate the signal generated by the vehicle key fob to open the car. To combat this, manufacturers added a security feature known as the CAN bus protocols to stop hackers from gaining access to the vehicle. Certain manufacturers have a unique encryption on their keys, which can't be decoded with a simple program. These types of cars require programming by a professional. Therefore, you should only attempt this process with someone who has experience with electronics. It is a good idea to refer to your car's owner manual or look up the manufacturer online, as the steps differ based on vehicle model. Transponder chips Transponder chip car keys require special reprogramming in order to function. Any hardware store can offer you a new car key, but the real challenge lies in implementing it to your car. The key you reprogrammed needs to be matched with the specific identification number of your vehicle otherwise it won't even start the engine. Transponder chips, which are used to protect cars from theft, are a common feature of modern cars. The chip is a small microcircuit that transmits a radio-frequency signal when the ignition key is put in. The car detects the signal and begins the engine only if the signal matches the original one that was programmed in the vehicle. The vehicle is also programmed to shut down when it detects an incompatible frequency. This makes it more difficult for car thieves with no experience to hot wire a vehicle and then start it. The chip and the key are connected by a circuit board that includes an induction coil. When the key is inserted into the ignition it creates a magnetic field around the transponder. This creates a signal that is absorbed by the coil, which sends it to the key's identification number. The ID number of the key is transmitted back to the vehicle, and if it matches, the engine will start. There are several 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. These tools are not cheap but are essential for programming your car's chip. You can also use a reprogrammable transponder key that was previously programmed for another vehicle. In this instance you'll need sure that the key is not damaged or the transponder been altered in any way. You can read the chip by using a scanner or a computer that has the USB connector. Reprogramming a transponder key is quite simple, but it requires an expertly designed software and scan tool. It is recommended to contact an auto locksmith for assistance for those who are new to the process. You should also avoid buying second-hand keys as they are likely already programmed and won't be compatible with your car. EZ Installer For decades, car owners who needed to replace their key fob had no choice than to visit a dealership to have their key electronically connected to the vehicle. It is because for modern keys to function, they need to be “paired”. This required expensive and complicated equipment that was available only to dealers. The EZ Installer from Car Keys Express solves this problem for retailers and locksmiths by simplifying the process of connecting modern keys to vehicles. The EZ Installer, a basic “plug-and-play” OBD device, connects new keys to vehicles without the use of complicated equipment or tokens to facilitate programming. It connects directly to the vehicle's standard OBD port, and then using a mobile app to provide simple instructions. The EZ Installer is compatible with all modern vehicles that include proximity keys or push-button start. Check the compatibility guide at Tom's website to see if your vehicle is compatible. A money-back guarantee of 100% is offered in the event that the device fails to successfully program a key or remote purchased from Tom's for a vehicle that is compatible. In contrast to traditional programming equipment that can cost retailers and key professionals thousands of dollars with typical per-key “token” costs, the EZ Installer Pro doesn't charge these fees at all, so it can be used as long as a key professional wishes to keep it. The EZ Installer also eliminates the requirement for expensive monthly service contracts and updates, so it could save retailers money while still offering customers the same high-quality service as OEM equipment. It also offers an industry-leading warranty that covers all hardware and software for the life of the product. Tools Locksmiths, auto mechanics, and owners of vehicles can utilize car key programming tools to program new keys for vehicles. These tools communicate with the vehicle's immobilizer system to program new keys and remote controls. They can also be used to copy existing keys and create duplicate keys. These tools are an essential tool for anyone who owns an automobile. Autel Maxisys MS906BT is among the most popular tools to program car keys. This scanner for vehicle diagnostics is compatible with all major brands and comes with advanced OE features. It features a key programming feature that can backup the current key information. It also resets the immobilizer or erase the fault codes. Another tool that is essential for reprogramming car keys is the OTOFIX IM1. This auto diagnostic scanner has advanced functions comparable to OE and can read passwords from all major brands. It also allows online calibration, customization and reading of EEPROM. The tool also has the ability 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 option for reprogramming cars. This scanner can read codes and key information from most vehicles in a few seconds which makes it a perfect tool for auto shops and locksmiths. It also has an active test function that allows you to identify the problem quickly and effectively. There are a variety of ways to reprogram your car, it is crucial to choose the right tools and to be aware of how to utilize them. A mistake in programming could cause damage to the vehicle's immobilizer system, and may prevent it from working. It is advised to seek advice from a professional prior to attempting to reprogram a car key. Another option is to buy the kit that comes with keys, a key programmer, remote control keys, and transponder chips. This will help ensure that you have everything you need to reprogram your car key. However, this process will take longer and requires some knowledge of electronic circuits and soldering.