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Reprogramming Car Keys Transponder keys for car keys are believed to make vehicles more secure and less likely to be duplicated by thieves. A key may have to be reprogrammed in the event that it is damaged or lost. You can reprogram your key fobs at home, however you need to know the right process. It is essential to have these items to achieve the best results: Keys Most modern cars require a transponder keys to operate. This gives security and protection against theft. The keys have to be programmed to the specific car and its systems by an authorized locksmith or dealer. It is expensive to replace them if they become lost, so it's best to have spares available. You can locate key fobs to replace them in online stores, as well as many brick and mortar auto shops. But how do you know that the one you purchased is authentic? Can you tell whether the unit has been programmed to work with a different vehicle or if yours can be reprogrammed? If you want to program a new key the first step is to make sure that your car is on and running. Insert the key you want to program into the ignition without turning it. You have just a few minutes before the system resets all commands and then exits the programming mode. Therefore, it is crucial to be quick and not wait between steps. To prevent this from happening, shut off the engine. You can test the system of your car by turning the key to the “on” position and back to the “off” position. There should be a chime indicating that the process was successful. The door locks will go through a cycle. Certain vehicles of recent years use rolling key technology to prevent thieves from using stolen keys to open the car. This technology is still vulnerable to a method known as replay attack which allows thieves to record the signal from the vehicle's key fob and then replicate it to unlock the car. To stop this, manufacturers have introduced an additional security feature known as the CAN bus protocol to prevent attacks on hacking. Some manufacturers also use special encryption on their key fobs, that cannot be decoded with an ordinary program. These types of vehicles will need to be programmed by a professional, and you should only try this with someone who has experience with electronics. It's a good idea to refer to your car's owner manual or search for the manufacturer online, as the steps will differ depending on the vehicle type. Transponder chips Car keys with transponder chips require a specific reprogramming to function. While any hardware store can cut a new key for you, the biggest problem is to make it work in conjunction with your particular car. The key you reprogrammed needs to be compatible with the exact identification number of your car, or it won't start the engine. Transponder chips are a typical feature of modern cars and are designed to stop car theft. The chip is a tiny microcircuit which transmits a radio-frequency signal when the ignition key is put in. The car then recognizes the signal and begins the engine if it matches the original signal that was programmed into the vehicle. The car is also programmed to stop when it detects an incompatible frequency. This makes it difficult for thieves with no experience to connect a vehicle to a hot wire and then start it. A circuit board that has an induction coil connects the key to the chip. When the key is placed in the ignition it creates an electromagnetic field around the transponder. This creates a signal which is received by the coil before being sent to the key identification number. The ID number of the key is sent back to the vehicle and if it is in line with the engine will begin to run. There are a variety of ways to program a transponder, however all of them require the use of a specific tool. These tools can be bought through the internet or from many automotive locksmiths. These tools are not cheap but are essential for programming the chip in your car. You can also utilize a transponder that is reprogrammable that has been previously programmed for another vehicle. In this case you'll need to make sure that the key isn't damaged or the transponder been altered in any way. The chip can be read by using a scanner or a computer that has a USB connector. Reprogramming an transponder is a simple procedure, but requires special software. It also requires the use of a scanner. If you're just beginning it is recommended to seek out the help of an auto locksmith. It is also recommended to avoid purchasing second-hand keys as they are likely already programmed and won't be compatible with your car. EZ Installer Until recently those who wanted to replace their key fob had to go to an agent to have it digitally paired to the vehicle. This is because in order to make modern keys work they have to be “paired”. This required expensive and complex equipment that was available only to dealers. The EZ Installer by Car Keys Express simplifies the process of pairing up modern keys with vehicles for retailers and locksmiths. The Easy Installer is a straightforward, “plug and play” OBD device that connects new keys to vehicles, without the need for complex equipment or programming tokens. It connects directly to the standard OBD port of the vehicle and utilizes a mobile application to provide easy to follow instructions. The EZ Installer works with all newer vehicles that include proximity keys or push button start. To determine if it'll work with a specific vehicle, look up the compatibility guidelines on Tom's site. A full-money-back guarantee is provided if the device does not successfully program a key or remote purchased from Tom's for a vehicle compatible. Contrary to conventional programming equipment that costs retailers and key professionals thousands of dollars through typical per-key “token” charges, the EZ Installer Pro doesn't charge any fees, so it can be used for as long as a retailer or key professional would like 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 still offering customers the same high-quality service as OEM equipment. It also comes with a renowned warranty that covers both hardware and software for the rest of your life. You can also find out more about Locksmiths, auto mechanics and even owners of vehicles can use car key programming tools to program new keys for vehicles. These tools can communicate with the vehicle's immobilizer system to program new keys and remote controls. They can also be used to clone existing keys and create duplicates. These tools are a useful tool for anyone who owns an automobile. One of the most popular tools for programming keys to cars is the Autel Maxisys MS906BT. This vehicle diagnostic scanner has advanced features that are OE-grade and is compatible with all of the top brands. It comes with an important programming feature and can backup current key data. It also has the capability of resetting the immobilizer and clearing immobilizer fault codes. Another important tool for reprogramming car keys is the OTOFIX IMM1. This auto diagnostic scanner has advanced functions comparable to OE and can read passwords from the majority of major brands. It can also perform online calibration, customization, and reading of EEPROM. The tool comes with the ability to bypass the PIN code of BMW and Mercedes. It is also able to read EEPROMs, car MCUs and CAN-EEPROMs of all major models. The XToolUSA Bidirectional Scanner is another option for reprogramming vehicles. This scanner can read codes and key information from most vehicles in a few seconds, making it a great tool for auto shops as well as locksmiths. It also comes with a live test function that helps find the issue quickly and efficiently. There are a myriad of ways to reprogram a car it is essential to select the appropriate tools and know how to make use of them. Incorrect programming can cause damage to the vehicle's immobilizer system, and may prevent it from working. It is best to consult a professional before trying to reprogram your car key. You can also purchase a kit that includes a key programmer, remote control key, and transponder chip. This will help ensure that you have everything you need to reprogramme your car key. more information , however, will take more time and requires a basic understanding of electronics and soldering.