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Reprogramming Car Keys Transponders in car keys are believed to make vehicles more secure and less likely to be duplicated by thieves. The key could need to be programmed again in the event of damage or lost. You can reprogram your key fobs at home, however you need to be aware of the correct procedure. For the best results, you should have the following items: Keys Most modern vehicles require a transponder fob or transponder keys to operate, ensuring 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 are costly to replace in the event of loss therefore, you should have spares in your car. You can also find replacement keys fobs on various websites and in many brick-and-mortar auto shops. How do you ensure that the one you purchased is genuine? Do you know if the unit has been programmed to work with another vehicle or if it could be programmed differently? To program a new car key you must first ensure that your vehicle is operating. Insert the key you'd like to program into the ignition, but don't turn it. You have just a few minutes before the system resets all commands and exits the programming mode. This is why it is crucial to move quickly and not be able to wait between steps. Stop the engine to stop this. Change 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. Some newer vehicles use rolling keys to keep thieves from using stolen keys to open the vehicle. The technology is still susceptible to a technique dubbed a replay attack which allows thieves to record the signal of the key fob on the vehicle, then reproduce it to unlock the car. To prevent this, manufacturers added security features known as the CAN bus protocols to stop hacking. Some manufacturers use a special encryption on their keys, which cannot be decoded by a simple program. It is best to only attempt this process if your experiences are with electronic devices. Refer to the manual for your car or look up the website of the manufacturer for information on how to program it. The steps are different depending on the type of vehicle. Transponder chips Transponder chip car keys require a special reprogramming to function. Any hardware store can make you an entirely new car key, however the real challenge lies in implementing it to your car. The key you reprogrammed needs to be matched with the exact identification number of your car, or it won't start the engine. Transponder chips are a standard feature of modern automobiles and are designed to stop car theft. The chip is a microcircuit which transmits a radio frequency signal when the key is placed into the ignition. The car then scans for the signal and begins the engine if it matches the original one that was programmed into the vehicle. The car also shuts down if the frequency is not valid. This makes it more difficult for novice car thefts to wire a vehicle hot and then start it. A circuit board that has an induction coil that connects the key to the chip. When the key is placed in the ignition the magnetic field is generated around the transponder. This generates a signal that gets absorbed by the coil, which then transmits it to key's identification number. The key's identification number is sent back to the car and the engine is started if the identification number matches. There are several ways to program a transponder, but each requires an instrument that is specifically designed for. You can purchase these tools on the internet or at many locksmiths in the automotive industry. They're not cheap, but they're vital for programming the chip into your car. You could also utilize a transponder that is reprogrammable that was previously programmed for a different vehicle. In this instance, you must make sure the key has not been damaged or that the transponder has not been altered in any way. To check this, you can use scanners or computers equipped with a USB port to read the chip and determine its identity. Reprogramming an transponder is a simple process, but requires specialized software. It also requires an scanner 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 be compatible with your vehicle. EZ Installer For a long time, car owners who required replacement of their key fob had no other choice than to visit an auto dealer to have their key electronically paired to the vehicle. This is because in order to make modern keys work they must be “paired”. This required expensive and complicated equipment that was available only to dealers. The EZ Installer by Car Keys Express simplifies the process of pairing up modern keys with vehicles used by retailers and locksmiths. The Easy Installer, a straightforward “plug-and-play” OBD device, connects new keys to vehicles without the use of complex equipment or tokens for programming. It works by connecting directly to the vehicle's standard OBD port and utilizing an app for mobile devices to provide simple-to-follow instructions. The EZ Installer is compatible with all modern vehicles that include proximity keys or push-button start. To determine if it'll work for a particular vehicle, check the compatibility guidelines on Tom's site. If the device is unable to program a remote or key purchased from Tom's into a vehicle compatible, a full refund is offered. Contrary to conventional programming equipment that costs key professionals thousands of dollars in typical per-key “token” fees, the EZ Installer Pro doesn't charge these fees at all which means it can be used as long as a key professional wants to use it. The EZ Installer also eliminates the requirement for expensive monthly service agreements and updates, which means it will reduce costs for retailers while providing customers with the same high-quality service as OEM equipment. It also offers a leading warranty that covers both hardware and software for the rest of your life. Tools Locksmiths, auto mechanics and owners of vehicles can utilize car key programming tools to create new keys for vehicles. These tools communicate with the vehicle's immobilizer in order to program new keys and remotely controlled. They can also be used to clone existing keys and create duplicate keys. These tools are an invaluable tool for anyone who owns a car. One of the most well-known tools for programming keys to cars is the Autel Maxisys MS906BT. The scanner for diagnostics of vehicles offers advanced OE-level features and is compatible with the majority of the top brands. It also comes with an option for key programming and the ability to save the most recent important information. It also resets the immobilizer, or clear the fault code. The OTOFIX IM1 is an important tool for reprogramming car keys. This auto diagnostic scanner can read passwords for most major brands, and it comes with advanced features comparable to OE. It can even perform online calibration and customization as well as reading EEPROM. It also comes with an option to bypass the BMW or Mercedes PIN code. It is also able to read EEPROMs, car MCUs, and CAN-EEPROMs of all major models. The XToolUSA Bidirectional Scanner is another top choice for reprogramming cars. It can read codes and key information from most vehicles in just a few seconds which makes it a perfect tool for auto shops and locksmiths. It also comes with a live test function that helps determine the cause quickly and effectively. There are a variety of ways to reprogram your car. It is important to have the right tools, and to know how they work. Incorrect programming could cause damage to the vehicle's immobilizer system, and may prevent it from starting. It is advised to consult a professional before trying to reprogram a car key. Another option is to purchase a kit that includes a key programmer, remote control keys, and transponder chips. This will ensure that you are equipped with all the tools you need to reprogram your car's key. This method takes longer and requires knowledge of soldering and electronics.