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Reprogramming Car Keys Transponder keys are said to be more secure for cars and harder to copy by thieves. However, keys may require reprogramming when it becomes damaged or lost. You can program key fobs yourself but you must be aware of the correct procedure. For click through the next page 'll need the following items: Keys Modern cars require a transponder keys to operate. This is a security feature and protection against theft. The keys are programmed by a locksmith or authorized dealer to function with your car's system and the specific model. It is expensive to replace them if they become lost, so it's better to keep extras on hand. You will also find replacement key fobs in various online stores and in many brick-and mortar auto shops. How can you know that the one you bought is authentic? Can you tell if the unit has been programmed to work with a different vehicle, or if it can be programmed again? To program a new car key, you must first verify that your vehicle is running. Insert the key that you'd like to reprogramme into the ignition, but do not turn it. There are just a few minutes before the system will reset all commands and leaves the programming mode. It is crucial to move quickly and don't be patient between each step. To prevent this from happening, shut off the engine. You can check the car's system by turning the key to the “on” position and back to the “off” position. The door locks should be able to cycle, and you'll hear a chime signalling that the process was successful. Certain cars with more modern technology have rolling key system, which prevents thieves from using stolen cars' key to start it. This feature is still vulnerable to a technique dubbed replay attack. It allows thieves to record and then duplicate the signal generated by the vehicle key fob to open the car. To prevent this, manufacturers added a security feature known as the CAN bus protocols to prevent hackers from gaining access to the vehicle. Some manufacturers also use special encryption on their key fobs, which cannot be decoded by an ordinary program. These kinds of cars require to be programmed by a professional, and you should only attempt this procedure only if you've worked with electronics. Check the manual of your car or look up the manufacturer's website to learn how to program it. The steps are different depending on the type of vehicle. Transponder chips Car keys that feature transponder chips require special programming to function. While any hardware store can cut keys for you, the biggest problem is to make it work in conjunction with your particular car. A reprogrammed key will need to be matched with the exact identification number of the vehicle or else it won't be able to start the engine. Transponder chips, which are used to protect cars from theft, are a common feature of modern automobiles. The chip is a microcircuit which transmits a radio frequency signal when the key is inserted in the ignition. The car then detects the signal and starts the engine in case it matches the original frequency that was programmed into the vehicle. The car also shuts down if the frequency is not valid. This makes it harder for novice car thefts to connect a vehicle to a hot wire and then start it. A circuit board that has an induction coil that connects the chip to the key. When the key is put in the ignition, a magnetic field is created around the transponder. This creates a signal that gets taken up by the coil, which sends it to the key's identification number. The ID number of the key is then sent back to the vehicle, and if it matches, the engine will start. There are several methods to program a key transponder, however all of them require a special tool. These tools can be bought through the internet or from many automotive locksmiths. They're not cheap, but they are vital for programming the chip in your vehicle. You may also use a reprogrammable transponder key that was previously programmed for a different vehicle. In this instance, you must ensure that the key isn't damaged or that the transponder is not altered in any way. To check this, you'll need a scanner or a computer with an USB port to read the chip and determine its identity. Reprogramming an transponder's key is easy, but it will require special software and a scanning tool. It is recommended to contact an auto locksmith for help if you're a novice. Avoid buying used keys as they could already be programmed and will not work with your car. EZ Installer In the past, car owners who wanted to replace their key fob had to go to an authorized dealer to get it digitally paired to the vehicle. This is because modern keys require to be “paired” to a specific vehicle in order to function in a way that required the use of expensive and complex equipment that only dealers had access to. The EZ Installer by Car Keys Express simplifies the process of pairing up modern keys with vehicles used by retailers and locksmiths. The EZ Installer is a basic, “plug and play” OBD device that pairs new keys with vehicles without the need for complicated equipment or programming tokens. It works by connecting directly to the vehicle's standard OBD port and using an app for mobile devices to provide simple-to-follow instructions. The EZ Installer is compatible with all modern vehicles with proximity keys or push-button start. Check the compatibility guide at Tom's site to see 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 that costs retailers and key professionals thousands of dollars through typical per-key “token” costs, the EZ Installer Pro doesn't charge any fees which means it can be used for as long as a retailer or key professional wants to use it. The EZ Installer also eliminates the need for costly monthly service contracts and updates, meaning that it can save retailers money while providing customers with the same high-quality service as OEM equipment. It also offers a top warranty that covers both hardware and software for the duration of your life. Tools Locksmiths, auto mechanics and vehicle owners 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. They can also be used to duplicate existing keys and create duplicates. These tools are an invaluable tool for anyone who owns a car. Autel Maxisys MS906BT is one of the most well-known tools to program car keys. The scanner for diagnostics of vehicles provides advanced features OE-level and is compatible with most of the major brands. It also comes with an option for key programming and is able to backup current key data. It also has the capability 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 is able to read passwords for most major brands and comes with advanced features that are OE-level. It is also able to perform online calibration and customization as well as reading of EEPROM. The tool also has the ability to bypass the BMW or Mercedes PIN code. It also has the ability to read EEPROM, car MCU and CAN EEPROMs for the majority of major models. The Bidirectional scanner XToolUSA is a popular option to reprogramme vehicles. This scanner can read codes and key information from most vehicles in a few seconds and is a fantastic tool for auto shops as well as locksmiths. It also has an active test feature that helps determine the cause quickly. There are a myriad of ways to reprogram your car. It is crucial to have the proper tools, and also to know how they function. Incorrect programming may damage the vehicle's immobilizer and stop it from beginning. Before you attempt to reprogram your car's key, it's best to seek advice from a professional. Another option is to buy an entire kit that includes keys, a key programmer, remote control keys, and transponder chips. This will ensure that you have everything you need to reprogramme your car key. However, this process will take more time and requires some understanding of electronic circuits and soldering.