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Reprogramming Car Keys Car keys with transponders are believed to make vehicles more secure and less likely to be duplicated by thieves. The key could need to be reprogrammed in the event of damage or lost. You can reprogram key fobs yourself but you must be aware of the correct procedure. You should have these items to ensure the best results: Keys Nearly all modern vehicles require a transponder key or fob to work, which provides security and anti-theft protection. These keys are programmed by a locksmith or authorized dealer to work with your car's systems and specific model. They can be costly to replace if lost and you should have spares in your car. 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 bought is authentic? Do you know whether the unit has been programmed to work with another vehicle, or if it can be reprogrammed? If you are planning to program a new key first, you need to ensure that your car is running. Insert the key you want to reprogramme into the ignition, but do not turn it. You have only a few seconds left before the system resets all commands and then exits the programming mode. For this reason, it is essential to move fast and not wait between steps. To prevent this from happening, shut off the engine. Turn the key from “on” to “off” to test the system. The door locks should cycle and you'll hear a chime to indicate that the process has been successful. Some newer vehicles use rolling keys to keep thieves from using stolen keys to start the car. This feature is still susceptible to a technique dubbed replay attack. It allows thieves to record and later reproduce the signal from the vehicle key fob to unlock the car. To combat this, manufacturers have added the security feature known as the CAN bus protocols to prevent hacking. Certain manufacturers have a unique encryption on their keys, which cannot be decoded using an ordinary program. These kinds of cars will need to be programmed by a professional, so you should only try this only if you've worked with electronics. Refer to the manual for your car or look up the website of the manufacturer to learn how to program it. The steps will vary depending on the type of vehicle. Transponder chips Transponder chip car keys require a specific reprogramming to work. Any hardware store can make you a new car key, but the real challenge is in integrating it with your vehicle. The key must be programmed to match the exact identification code on your vehicle, or else it will not start. Transponder chips, which are used to stop theft of cars, are a common feature of modern automobiles. The chip is a microcircuit which transmits a radio-frequency signal when the ignition key is put in. The car then scans for the signal and starts the engine if it matches the original one that was programmed into the vehicle. The car will also shut down if a frequency is invalid. This makes it much harder for thieves who are not experienced to connect a vehicle with hot wires and start it. The chip and the key are connected by the circuit board which includes an induction coil. When the key is placed in the ignition the magnetic field is created around the transponder. This creates a signal that gets absorbed by the coil, which then transmits it to key's identification number. The key's identification number is transmitted back to the car, and the engine starts if the identification number matches. There are several methods to program a transponder keys, however, all require a special tool. You can purchase these tools on the internet or at many automotive locksmiths. These tools are not expensive, but they are essential to program your car's chip. You can also make use of a transponder key that can be reprogrammed that was previously programmed for another vehicle. In this case, make sure that the key isn't damaged or the transponder isn't 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. Reprogramming a transponder is a simple procedure, but requires specific software. It also requires an scanner tool. It's best to ask an auto locksmith for assistance if you're a novice. It is also recommended to avoid purchasing second-hand keys, since they're likely to be programmed and will not work with your car. EZ Installer For a long time, owners of cars who required replacement of their key fob had no other option than to go to a dealership to have their key electronically paired to the vehicle. This is because modern keys need to be “paired” to a specific vehicle to function and work, which required expensive and complicated equipment that only dealers could access. The EZ Installer from Car Keys Express solves this issue for retailers and locksmiths by easing 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 need for complex equipment or tokens for programming. It connects directly to the standard OBD port of the vehicle and uses a mobile application to provide easy to follow instructions. The EZ Installer is compatible with the majority of newer vehicles that include proximity keys or push button start. To see if it will be compatible with your specific vehicle, check the compatibility guide on Tom's website. If the device is unable to program a remote or key purchased from Tom's into a vehicle that is compatible then a full refund is offered. Unlike traditional programming equipment that can cost retailers and key professionals thousands of dollars in typical per-key “token” costs, the EZ Installer Pro doesn't charge these fees at all which means it can be used as long as a retailer or key professional wants it to be. The EZ Installer eliminates the need for expensive monthly service contracts and software updates. This allows retailers to save money while providing their customers the same high-quality service as OEM equipment. It also comes with an industry-leading warranty that includes all software and hardware for the duration of its life. Tools Locksmiths, auto mechanics, and owners of vehicles can utilize 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. These tools can be used to create duplicate keys and clone keys. These tools are an invaluable tool for anyone who owns a car. Autel Maxisys MS906BT is among the most sought-after tools for programming car key s. This scanner for vehicle diagnostics is compatible with the major brands and provides advanced OE features. It also comes with a key programming function and the ability to save current key data. It also resets the immobilizer, or clear the fault code. Another important tool to reprogramme car keys is the OTOFIX IM1. This auto diagnostic scanner is able to read passwords for most major brands and has advanced OE-level features. It is also able to perform online calibration as well as customization and EEPROM reading. The program 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 all major models. The XToolUSA Bidirectional Scanner is another top choice for reprogramming vehicles. This is a wonderful tool for auto repair shops and locksmiths because it can read key codes and other data from all vehicles in just a few minutes. It also has a live test feature that allows you to find the problem quickly. There are a myriad of ways to reprogram a car, it is essential to use the right tools and to know how to use them. A mistake in programming could cause damage to the car's immobilizer system, and may prevent it from starting. It is recommended to consult a professional before attempting to reprogram a car key. You can purchase a kit that includes the key programmer, a remote control key, and transponder chip. This will ensure that you are equipped with everything you require to reprogram your car's key. This process is more time-consuming and requires knowledge of soldering and electronics.