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Reprogramming Car Keys Transponder keys are believed to be more secure for cars and harder to copy by thieves. The key could need to be programmed again in the case of damage or lost. You can program key fobs yourself however, you must be aware of the correct process. It is essential to have these items to get the most effective results: Keys Almost all modern cars require a transponder fob or transponder keys to operate, providing security and protection against theft. The keys have to be programmed to your specific car and its systems by a licensed dealer or locksmith. It's costly to replace them if they're lost, so it's better to have spares in your possession. You can purchase key fobs to replace them in online stores and many brick and mortar auto shops. But how do you know that the one you have bought is genuine? Can you tell whether the unit is programmed to work with another vehicle or if yours can be programmed again? To program a new car key you must first verify that your car is running. Insert the key that you'd like to reprogramme into the ignition, but don't turn it. You will only have a couple of seconds before the car's system resets the commands and leaves programming mode. It is crucial to move quickly and do not wait between each step. To prevent this from happening, shut off the engine. You can check the car's system by turning the key to the “on” position, then back to the “off” position. The door locks should be able to cycle, and you will hear a sound that indicates that the procedure was successful. Some newer vehicles use rolling keys to stop thieves from using stolen keys to start the vehicle. This feature is still susceptible to a technique dubbed a replay attack. It allows thieves to record and duplicate the signal generated by the vehicle key fob to open the car. To prevent this, manufacturers have added security features known as the CAN bus protocols to prevent hackers from gaining access to the vehicle. Some manufacturers also use special encryption on their key fobs, which are not decoded by an easy program. You should only try this method if your previous experience is with electronic devices. It is recommended to consult your car's owner manual or look up the manufacturer online, as 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, but the real challenge is in making it work with your car. The key has to be programmed to match the exact identification number of your vehicle, or else it won't start. Transponder chips are a standard feature of modern automobiles and are designed to prevent car theft. The chip is a microcircuit which emits a radio frequency signal when the key is inserted into the ignition. The car can detect the signal, and starts the engine only if the signal matches the original that was programmed in the vehicle. The car also shuts down if a frequency is not valid. This makes it much harder for novice car thieves to wire a vehicle and start it. The chip and the key are connected via an electronic circuit board that contains an induction coil. 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 transmits it to the key's identification number. The key's ID number is sent back to the vehicle, and if it is in line with the engine will start. There are a few different methods to program a transponder key, however, they all require an instrument that is specifically designed for the purpose. These tools can be bought online or from most automotive locksmiths. These tools aren't inexpensive, but they are vital for programming the chip in your car. You could also use a resettable key that was programmed for another vehicle. In this instance you'll need sure that the key is not damaged or that the transponder has been altered in any way. To accomplish this, you'll need a scanner or a computer equipped with an USB port to read the chip and determine its identity. Reprogramming the transponder is a straightforward procedure, but requires specific software. It also requires the use of a scanner. It is best to consult an auto locksmith for help in case you're not an expert. Also, avoid buying second-hand keys, since they are likely already programmed and won't be compatible with your car. EZ Installer In the past, car owners who wanted to replace their key fob were forced to go to a dealer to have it electronically paired with the vehicle. This is because, in order to make modern keys work they must 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 used by retailers and locksmiths. The Easy Installer is a straightforward, “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 standard OBD port of the vehicle, and runs an application that is mobile to provide easy to follow instructions. The EZ Installer works with all newer vehicles, including those with proximity keys or push button start. Check the compatibility guide at Tom's website to see if your vehicle is compatible. A full-money-back guarantee is provided in the event that the device fails to successfully program a key or remote purchased from Tom's for a vehicle that is compatible. Unlike traditional programming equipment that costs retailers and key professionals thousands of dollars in typical per-key “token” fees, the EZ Installer Pro doesn't charge these fees at all, so it can be used for as long as a key professional would like to use it. The EZ Installer also eliminates the need for costly monthly service contracts and updates, so it will reduce costs for retailers while providing the same quality service as OEM equipment. It also comes with a world-class warranty that includes all software and hardware for the life of the product. Tools Locksmiths, auto mechanics and vehicle owners can use car key programming tools to create new keys for vehicles. These tools communicate with 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 essential tool for anyone who owns a vehicle. One of the most admired tools for programming keys to cars is the Autel Maxisys MS906BT. This vehicle diagnostic scanner provides advanced features OE-level and is compatible with most of the top brands. It has a key programming feature and can backup current key data. It also resets the immobilizer, or clear the fault codes. Another tool that is essential to reprogramme car keys is the OTOFIX IMM1. This auto diagnostic scanner comes with advanced functions that are OE-level and can read passwords from all major brands. It also performs online calibration as well as customization and reading EEPROM. It also comes with an option that allows it to bypass the PIN code for BMW and Mercedes. It is also able to read EEPROMs, car MCUs, and CAN-EEPROMs for all major models. The XToolUSA Bidirectional Scanner is another popular choice for reprogramming cars. This tool can read codes and key information from most vehicles in a few seconds, making it a great tool for auto shops and locksmiths. It also has an active test feature that allows you to find the problem 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 may cause damage to the immobilizer of the vehicle and prevent it from starting. It is best to consult a professional before trying to reprogram your car key. You can purchase a kit that includes keys, a key programmer, remote control key and transponder chip. This will ensure that you're equipped with all the tools you need to reprogram the car key. This process is more time-consuming and requires a basic understanding of soldering and electronics.