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Reprogramming Car Keys Transponder keys for car keys are thought to keep cars more secure and are more difficult for thieves to duplicate. The key could need to be programmed again in the event of damage or lost. You can reprogram key fobs yourself, but you must know the proper procedure. You should have these items to get the best results: Keys Most modern cars require a transponder key in order to operate. This provides security and anti-theft protection. The keys have to be programmed to the specific car and its systems by a certified locksmith or dealer. They are costly to replace if lost, so you should keep extras handy. You can also find replacement key fobs in various online stores and in many brick-and-mortar auto shops. How do you ensure that the one you purchased is authentic? Do you know whether the unit has been programmed to work with another vehicle or if yours can be reprogrammed? If you want to program a new key first, you need to make sure that your car is on and running. Insert the key you wish to reprogram into the ignition, but do not turn it. You only have just a few seconds before the car's system resets commands and exits programming mode. It is important that you be quick and don't wait between each step. Stop the engine to avoid this. Switch the key from “on” to “off” to test the system. You should hear a sound to indicate that the process was successful. The door locks will go through a cycle. Some newer cars use a rolling key technology, which prevents thieves from using a stolen car's key to start it. This feature is still susceptible to a technique called a replay attack. It allows thieves to record and reproduce the signal from the car key fob to unlock the car. To counter this, manufacturers have introduced an additional security feature known as the CAN bus protocol to thwart hacking attempts. Some manufacturers also use special encryption on their key fobs which cannot be decoded by an easy program. You should only attempt this process if your experience is with electronic devices. It is recommended to refer to the owner's manual for your car or look up the manufacturer on the internet, since the steps will differ depending on the vehicle model. Transponder chips Car keys with transponder chips require a special programming to function. Any hardware store can give you an entirely new car key, however the real challenge lies in implementing it to your vehicle. The key must be programmed to match the exact identification number of your car, otherwise it won't start. Transponder chips, which are used to prevent car theft, are a common feature of modern cars. 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 frequency that was programmed into the vehicle. The car is also programmed to shut down when it detects an incompatible frequency. This makes it much more difficult for novice car thieves to hot wire a vehicle and then start it. The chip and the key are linked by an electronic circuit board that contains an induction coil. When the key is inserted into the ignition it creates an electric field around the transponder. This generates a signal, which is taken up by the coil and sent to the key's identification number. The key's identification number is transmitted back to the car and the engine is started when the identification number is in line with. There are several ways to program a key transponder, however all require an instrument that is specifically designed for. You can purchase these tools on the internet or at many automotive locksmiths. They are not cheap, but they are crucial for programming the chip in your vehicle. You can also use a reprogrammable transponder key that has been previously programmed for another vehicle. In this case you'll need sure that the key is not damaged or that the transponder has been altered in any way. The chip can be read with a scanner, or a computer that has a USB connector. Reprogramming an transponder's key is simple, however it requires special software and a scanning tool. It is best to consult an auto locksmith for assistance if you're a novice. Don't buy used keys since they could already be programmed, and they won't work with your vehicle. EZ Installer Prior to recently, car owners who wanted to replace their keys were required to visit an authorized dealer to get it digitally paired to the vehicle. It is because to make modern keys work they must be “paired”. This required expensive and complex equipment that was only available 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, a straightforward “plug-and-play” OBD device, pairs new keys with vehicles without the need for complicated equipment or tokens to facilitate programming. It connects directly to the vehicle's standard OBD port, and then using an app for mobile devices to provide simple-to-follow instructions. The EZ Installer works with a wide range of modern vehicles with proximity keys or push-button start. To determine if it'll be compatible with your specific vehicle, refer to the compatibility guidelines on Tom's site. A money-back guarantee of 100% is offered in the event that the device fails to successfully program a key or remote purchased from Tom's for a vehicle that is compatible. Contrary to conventional programming equipment which costs key retailers and professionals hundreds of thousands of dollars in “token” fees per key, the EZ Installer Pro does not charge these fees. It can be used for as long as the key professional or retailer requires. The EZ Installer also eliminates the requirement for expensive monthly service agreements and updates, which means it will reduce costs for retailers while providing the same quality service as OEM equipment. It also offers a top warranty that covers both hardware and software for the duration 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 create new keys for cars. These tools connect to the vehicle's immobilizer system to program new keys and remote controls. They can also be used to duplicate existing keys and create duplicates. These tools are an invaluable tool for anyone who owns a car. Autel Maxisys MS906BT is one of the most well-known tools for programming keys for cars. This scanner for vehicle diagnostics offers advanced OE-level features and is compatible with most of the major brands. It comes with a key programming feature and can backup the current key information. It also has the capability of resetting the immobilizer and clearing immobilizer fault codes. Another important tool for car key reprogramming is the OTOFIX IMM1. This auto diagnostic scanner can read passwords from all major brands and has advanced features comparable to OE. It can also perform online calibration, customization and reading of EEPROM. The program also has the ability to bypass the BMW or Mercedes PIN code. It is also able to read EEPROM, car MCU, and CAN EEPROMs for the majority of major models. The Bidirectional scanner XToolUSA is a popular option to reprogramme vehicles. transponder key programming G28 Car Keys UK 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 has an active test feature that helps determine the cause quickly. There are a variety of ways to modify the car's programming. It is essential to have the right tools, and also to know how they function. A mistake in programming could cause damage to the car's immobilizer system, and may prevent it from starting. Before you attempt to reprogram your car key, it is best to consult a professional. You can also purchase a kit which includes a key programmer, remote control key and transponder chip. This will ensure that you have everything you need to reprogramme your car key. This method, however, takes longer and requires a basic understanding of electronics and soldering.