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Reprogramming Car Keys Transponder keys are thought to be more secure for vehicles and more difficult to copy by thieves. Keys may need to be reprogrammed in the event that it is damaged or lost. You can reprogram your key fobs at home, however you must know the right process. To get the best results, you must have the following items: Keys Most modern cars require a transponder keys to operate. This is a security feature and anti-theft protection. The keys must be programmed to your particular vehicle and its features by an authorized dealer or locksmith. It is expensive to replace them if they are lost, so it's better to have spares in your possession. You can find key fobs to replace them in online stores as well as many brick-and mortar auto shops. How can you ensure that the one you purchased is authentic? Do you know whether it has been programmed for a different vehicle or if it is able to be reprogrammed for yours? If you want to program an entirely new key, the first step is to ensure that your car is operating. Insert the key you want to program into the ignition, but do not turn it. There are only a few seconds before the system will reset all commands and then exits the programming mode. It is crucial to move quickly and don't wait between each step. To prevent this from happening, turn off the engine. You can check the car's system by turning the key to the “on” position, then back to the “off” position. There should be a chime to indicate that the process was successful. The door locks will go through a cycle. Certain newer vehicles utilize rolling keys to keep thieves from using stolen keys to open the vehicle. This technology is still vulnerable to a method known as replay attacks that allows thieves to record the signal of the key fob on the vehicle and reproduce it later to open the car. To prevent this, manufacturers introduced security features known as the CAN bus protocols to ward off hacking. Certain manufacturers have a unique encryption on their keys, which can't be decoded with a simple program. It is best to only attempt this process if your experience is in electronic devices. Consult your car's manual or look up the manufacturer's website to find out how to program it. The steps to follow will differ depending on the model of vehicle. Transponder chips Car keys with transponder chips require a special reprogramming to work. While any hardware store can cut a new key for you, the real challenge is making it function to work with the specific car you own. The key you reprogrammed needs to be compatible with the specific 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 which transmits a radio frequency signal when the key is placed in the ignition. The car then detects the signal and starts the engine if it is in line with the original frequency that was programmed into the vehicle. The car also shuts down if the frequency is not valid. This makes it much harder for car thieves with no experience to wire a vehicle and start it. The key and the chip are connected by an electronic circuit board that contains an induction coil. When the key is inserted into the ignition, it creates a magnetic field around the transponder. This generates a signal, which is absorbed by the coil and then transmitted to the key identification number. The key's identification number is transmitted back to the car and the engine will start when the identification number matches. There are several methods to program a key transponder, however all of them require the use of a specific tool. These tools can be bought online or from most automotive locksmiths. They're not cheap, but they're essential for programming the chip into your car. You can also utilize a transponder that is reprogrammable that was previously programmed for a different vehicle. In this case you'll need to make sure that the key isn't damaged or the transponder been altered in any way. You can read the chip by using a scanner or a computer that has the USB connector. The process of reprogramming a transponder key is quite simple, but it requires special software and a scanning tool. If you're a beginner, it's best to seek the assistance of an auto locksmith. It is also recommended to avoid purchasing second-hand keys as they're probably already programmed and will not work with your car. EZ Installer Until recently, car owners who wanted to replace their key fob had to visit a dealer to have it electronically linked to the vehicle. This is because modern keys have to be “paired” to a specific vehicle to function, which required the use of expensive and complex equipment that only dealers could access. The EZ Installer from Car Keys Express solves this issue for locksmiths and retailers by making it easier for connecting modern keys to vehicles. 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 connects directly to the standard OBD port on the vehicle and uses an application that is mobile to provide easy to follow instructions. The EZ Installer works with most modern vehicles that include proximity keys or push-button start. To determine if it'll work with a specific vehicle, check the compatibility guidelines on Tom's site. If the device fails to program a remote or key purchased from Tom's into a vehicle compatible the full refund will be provided. Unlike traditional programming equipment that costs retailers and key professionals thousands of dollars with typical per-key “token” costs, the EZ Installer Pro doesn't charge any fees and can be used as long as a retailer or key professional wishes to keep it. The EZ Installer eliminates the need for costly monthly service contracts and software updates. This lets retailers save money while giving their customers the same high-quality service as OEM equipment. It also comes with a renowned warranty that covers both hardware and software for the duration of your life. You can also learn more about Locksmiths, auto mechanics, and owners of vehicles can utilize car key programming tools to program new keys for cars. These tools communicate with a vehicle's immobilizer to program new keys and remotely controlled. These tools can be used to make duplicates and clone keys. These tools are an invaluable tool for anyone who owns a car. One of the most well-known tools for programming car keys is the Autel Maxisys MS906BT. This vehicle diagnostic scanner is compatible with the major brands and provides advanced OE features. It also has a key programming function and is able to backup current important data. car key programmer has the capability of resetting the immobilizer and clearing immobilizer fault codes. Another tool that is essential for reprogramming car keys is the OTOFIX Im1. This auto diagnostic scanner is able to read passwords from all major brands and comes with advanced features comparable to OE. It also performs online calibration as well as customization and EEPROM reading. The tool comes with an option that allows it to bypass the PIN code of BMW and Mercedes. It can also read EEPROM, car MCU and CAN EEPROMs for all major models. The XToolUSA Bidirectional Scanner is another option to reprogramme cars. This is a fantastic tool for auto repair shops and locksmiths since it can read key data and codes from most vehicles within seconds. It also comes with a live test function that can help determine the cause quickly and efficiently. There are a myriad of ways to reprogram your car, it is crucial to select the appropriate tools and know how to use them. Uncorrect programming can cause damage to the immobilizer on the vehicle and stop it from beginning. Before you attempt to program your car key, it is recommended to consult with an expert. You can also purchase a kit which includes the key programmer, a remote control key, and transponder chip. This will ensure that you have everything you need to reprogram your car key. This process is more time-consuming and requires a basic understanding of soldering and electronics.