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Reprogramming Car Keys Car keys with transponders are thought to keep vehicles safer and are harder for thieves to duplicate. A key may have to be programmed again in the event of damage or lost. You can reprogram your key fobs at home, but you should know the right process. For the best results, you'll need the following items: Keys Most modern vehicles require a transponder key or fob in order to operate, ensuring security and anti-theft protection. These keys are programmed by a locksmith or an authorized dealer to work with your car's system and the specific model. It's expensive to replace them if they are lost, so it's better to have spares available. You can locate replacement key fobs in online stores as well as numerous brick-and-mortar auto shops. But how do you know that the new one you have bought is genuine? Can you tell if it has been programmed to work with another vehicle or if it could be reprogrammed for yours? To program a new car keys, you must first verify that your car is running. Insert the key that you want to program into the ignition, but do not turn it. You will only have a couple of seconds before the car's system resets the commands and exits programming mode. It is crucial to be quick and don't be patient between each step. Shut off the engine to stop this. Switch the key from “on” to “off” to test the system. The door locks should cycle and you will hear a chime signalling that the process was successful. Certain vehicles of recent years use rolling keys to stop thieves from using stolen keys to start the vehicle. This feature is still susceptible to a technique known as a replay attack. It allows thieves to record and reproduce the signal received from the key fob of the vehicle to open the car. To prevent this, manufacturers have added a security feature called CAN bus protocol to stop hacking attempts. Some manufacturers also use special encryption on their key fobs, that cannot be decoded with an ordinary program. These kinds of cars require programming by a professional, and you should only try this with someone who has experience with electronic devices. Check the manual of your car or look up the manufacturer's website for information on how to program it. The steps will vary depending on the model of vehicle. Transponder chips Transponder chip car keys require a specific reprogramming to function. Any hardware store can offer you a new car key, but the real challenge lies in making it work with your vehicle. A key that has been reprogrammed will need to match the exact identification number of your vehicle, or it won't start the engine. Transponder chips are a common feature of modern automobiles 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 then scans for the signal and then starts the engine if it is in line with the original one that was programmed into the vehicle. The car will also shut down if a frequency is not valid. This makes it much harder for novice car thieves to hot wire a vehicle and then start it. A circuit board equipped with 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 generates a signal that is absorbed by the coil and then transmitted to the key identification number. The key's identification number is then returned to the car and the engine will start when the identification number is in line with. There are a few different ways to program a transponder key however, they all require a special tool. You can purchase these tools online or from most automotive locksmiths. These tools aren't inexpensive, but they are vital for programming your car's chip. You could also use a unreprogrammable key that was programmed for an alternative vehicle. In this scenario, make sure the key isn't damaged or the transponder has not been altered in any way. To check this, you can use scanners or a computer equipped with a USB port to scan the chip and determine its identity. The process of reprogramming a transponder key is quite simple, but it requires special software and a scanning tool. If you're a beginner you should seek help from an auto locksmith. It is also recommended to avoid purchasing second-hand keys, since they're likely to be programmed and won't be compatible with your car. EZ Installer For decades, car owners who needed to replace their key fob had no alternative than to visit a dealership to have their key electronically connected to the vehicle. This is because modern keys need to be “paired” to a specific vehicle in order to function and work, which required the use of expensive and complicated equipment that only dealers could access. The EZ Installer by Car Keys Express simplifies the process of pairing up modern keys with vehicles used by locksmiths and retailers. 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 an app for mobile devices to provide simple instructions. The EZ Installer is compatible with the majority of newer vehicles, including those with proximity keys or push button start. Go to the compatibility guide on Tom's website to determine whether your vehicle is compatible. A money-back guarantee of 100% is offered if the device does not successfully program a key or remote purchased from Tom's for a compatible vehicle. 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 can be used for as long as the key professional or retailer needs. The EZ Installer eliminates the need for costly 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 offers a leading warranty that covers hardware and software for the remainder of your life. You can also learn more about Locksmiths, auto mechanics and vehicle owners can use car key programming tools to create new keys for cars. These tools communicate with the vehicle's immobilizer system to create new keys and remote controls. They can also be used to copy existing keys and create duplicate keys. These tools are a valuable tool for anyone who has a vehicle. Autel Maxisys MS906BT is one of the most sought-after tools for programming car keys . The scanner for diagnostics of vehicles offers advanced OE-level features and is compatible with most of the major brands. It also has an option for key programming and can backup the most recent important information. It also resets the immobilizer, or clear the fault code. The OTOFIX IM1 is another important tool for reprogramming keys for cars. This auto diagnostic scanner comes with advanced functions comparable to OE and can read passwords from most major brands. It also performs online calibration as well as customization and reading of EEPROM. The program also has a feature to bypass a BMW or Mercedes PIN code. It also has the ability to read EEPROM, car MCU and CAN EEPROMs for all major models. The XToolUSA Bidirectional Scanner is another popular choice to reprogramme cars. This scanner can read codes and key information from most vehicles in just a few seconds and is a fantastic tool for auto shops as well as locksmiths. It also has an active test feature that helps find the problem quickly. There are a myriad of ways to reprogram your car. It is essential to have the proper tools, and to know how they work. Uncorrect programming can damage the vehicle's immobilizer and prevent it from starting. It is recommended to consult a professional before attempting to reprogram a car key. Another option is to buy an entire kit that includes the key programmer, a remote control key, and transponder chips. This will ensure that you are equipped with all the tools you require to reprogram your car's key. However, this process takes longer and requires some understanding of electronics and soldering.