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Reprogramming Car Keys Transponder keys are said to be more secure for cars and are more difficult to copy by thieves. However, keys may need to be reset when it becomes damaged or lost. You can reprogram key fobs yourself however, you must be aware of the correct procedure. You should have these items to achieve the most effective results: Keys Most modern cars require a transponder key in order to operate. This provides security and anti-theft protection. The keys are programmed by a locksmith or an authorized dealer to work with your car's system and the specific model. It is expensive to replace them if they're lost, so it's a good idea to have spares available. You can also find replacement keys fobs on various websites and in many brick-and mortar auto shops. How can you know that the one you bought is authentic? Do you know whether it was programmed to work with another vehicle or if it could be reprogrammed for yours? To program a new car key you must first ensure that your car is running. Insert the key you'd like to program into the ignition, but do not turn it. You have only a few seconds before the system will reset all commands and then exits the programming mode. It is essential to move quickly and do not wait between each step. Stop the engine to stop this. You can check the car's system 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 newer vehicles utilize rolling key technology to prevent thieves from using stolen keys to open the car. This feature is still susceptible to a technique known as a replay attack. It allows thieves to record and later reproduce the signal received from the vehicle key fob to open the car. To combat this, manufacturers have added security features known as the CAN bus protocols to stop hacking. Certain manufacturers also employ special encryption on their key fobs, that cannot be decoded with a simple program. You should only attempt this method if you have experience is in electronic devices. It is a good idea to read your car's owner manual or look up the manufacturer on the internet, since the steps differ based on vehicle type. Transponder chips Car keys with transponder chips require a special reprogramming to work. Any hardware store can give you an entirely new car key, however the real challenge lies in implementing it to your vehicle. A key that has been reprogrammed will need to be compatible with the exact identification number of your car otherwise it won't even start the engine. Transponder chips, used to protect cars from theft are a standard feature of modern cars. The chip is a microcircuit which transmits a radio frequency signal 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 invalid. This makes it harder for thieves who aren't experienced to connect a vehicle to a hot wire and then start it. A circuit board that has an induction coil connects the chip to the key. When the key is placed in the ignition the magnetic field is generated around the transponder. This generates a signal, which is received by the coil and sent to the key's identification. The ID number of the key is then sent back to the vehicle, and if it is in line with the engine will begin to run. There are many ways to program a key transponder, but each requires the use of a specific tool. These tools are available online or from most automotive locksmiths. These tools are not inexpensive, but they are vital to program your car's chip. You can also use an unreprogrammable key that was programmed for an alternative vehicle. In this scenario, make sure the key isn't damaged or that the transponder is not altered in any way. You can read the chip by using a scanner or a computer with an USB connector. The process of reprogramming a transponder key is quite easy, but it will require special software and a scanning tool. If you're new to the process, it's best to seek help from an auto locksmith. It is also recommended to avoid purchasing second-hand keys as they are likely already programmed and will not be compatible with your car. EZ Installer Until recently the time when car owners wanted to replace their key fob were forced to visit a dealer to have it electronically paired with the vehicle. This is because in order to make modern keys work they have to 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 locksmiths and retailers. The EZ Installer is a simple, “plug and play” OBD device that connects new keys with vehicles without the need for expensive equipment or programming tokens. It connects directly to the vehicle's standard OBD port and using an app on mobile devices to provide simple instructions. The EZ Installer works with a wide range of modern vehicles that include proximity keys or push-button start. Go to the compatibility guide on Tom's website to determine if your vehicle is compatible. If the device is unable to program a remote or key purchased from Tom's into a vehicle that is compatible, a full refund is offered. In contrast to traditional programming equipment that costs key professionals thousands of dollars in typical per-key “token” fees, the EZ Installer Pro doesn't charge any fees, so it can be used as long as a key professional wants to keep it. The EZ Installer eliminates the need for expensive monthly service contracts and software updates. This allows retailers to save money while offering their customers the same high quality service as OEM equipment. It also offers a top warranty that covers hardware and software for the remainder 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. These tools can be used to create duplicates and clone keys. These tools are a valuable tool for those who own 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 all major brands and comes with advanced OE features. It comes with an important programming feature that can backup the current key information. It is also capable of resetting the immobilizer as well as clearing immobilizer fault codes. The OTOFIX IM1 is an important tool for reprogramming car keys. This auto diagnostic scanner can read passwords for all major brands and has advanced features comparable to OE. It also has the ability to perform online calibration, customization and EEPROM reading. It also comes with a feature that allows it to bypass the PIN code for BMW and Mercedes. It can also read EEPROM, car MCU and CAN EEPROMs for all major models. The XToolUSA Bidirectional Scanner is another popular choice for reprogramming vehicles. This is a wonderful tool for auto repair shops and locksmiths as it can read key codes and other data from most vehicles within minutes. It also has an active test feature that helps determine the cause quickly. There are a myriad of ways to modify the car's programming. It is essential to have the right tools, and also to know how they work. Incorrect programming could cause damage to the vehicle's immobilizer system, and may prevent it from working. Before you attempt to program your car key, it is best to seek advice from an expert. Another option is to purchase an entire kit that includes a key programmer, remote control key, and transponder chips. This will ensure that you are supplied with everything you require to reprogram the car key. This method, however, will take more time and requires some knowledge of electronic circuits and soldering.