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Reprogramming Car Keys Transponder keys for car keys are believed to make cars more secure and are less likely to be duplicated by thieves. However, a key may require reprogramming when it becomes damaged or lost. You can reprogram your key fobs at home, however you must be aware of the correct procedure. You should have these items to ensure the most effective results: Keys Almost all modern cars require a transponder key or fob to operate, providing security and protection against theft. These keys must be programmed to your particular car and its systems by an authorized locksmith or dealer. They are expensive to replace in the event of loss, so it is recommended to keep spare keys in the car. You can also find replacement keys fobs on various websites and in a variety of brick-and-mortar automotive shops. How do you ensure that the new one you purchased is genuine? Are you able to tell whether it has been programmed to work with another vehicle or if it can be reprogrammed for yours? If you want to program an entirely new key first, you need to make sure that your car is on and running. Insert the key that you wish to program into the ignition, but don't turn it. You will only have a few seconds before the car's system resets commands and then exits programming mode. It is crucial to move quickly and do not delay between each step. Turn off the engine to avoid this. You can check the system of your car by turning the key to the “on” position and then back to the “off” position. You should hear a sound signalling that the procedure was successful. The door locks will go through a cycle. Certain cars with more modern technology have rolling key system, which keeps thieves from using a stolen vehicle's key to open it. The technology is still susceptible to a method known as replay attack, which allows thieves to record the signal received from the vehicle's key fob and reproduce it later to unlock the car. To combat this, manufacturers have added a security feature known as the CAN bus protocols to prevent hackers from gaining access to the vehicle. Certain manufacturers also employ special encryption on their key fobs which are not decoded by a simple program. You should only attempt this process if your experience is with electronics. It is a good idea to refer to the owner's manual of your vehicle or search for the manufacturer on the internet, since these steps vary by vehicle model. Transponder chips Car keys with transponder chips need special programming to function. While any hardware store can cut keys for you, the real challenge is making it function in conjunction with your particular car. The key you reprogrammed needs to be matched with the specific identification number of your car, or it won't start the engine. Transponder chips, used to prevent car theft are a standard feature of modern cars. The chip is a microcircuit that transmits a radio-frequency signal when the ignition key is placed. The car then scans for the signal and begins the engine if it is in line with the original frequency that was programmed into the vehicle. The car is also programmed so that it will shut down if it detects an invalid frequency. This makes it much harder for thieves who are not experienced to hot wire a vehicle and then start it. The key and the chip 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 is absorbed by the coil, which sends it to the key's identification number. The key's identification code is returned to the car and the engine is started if the identification number matches. There are many ways to program a key transponder, however all require the use of a specific tool. You can purchase these tools on the internet or at many locksmiths in the automotive industry. These tools aren't expensive, but they are essential for programming the chip in your car. You could also use a reprogrammable key that was previously programmed for another vehicle. In this instance, you'll need to make sure that the key isn't damaged or that the transponder has been altered in any way. To accomplish this, you can use a scanner or a computer equipped with a USB port to scan the chip and determine its identity. Reprogramming the transponder is a straightforward procedure, but it requires special software. It also requires a scanner tool. If you're a beginner, it's best to seek the assistance of an auto locksmith. Don't buy used keys since they could already be programmed and won't work with your car. EZ Installer Prior to recently the time when car owners wanted to replace their key fob were forced to visit an authorized dealer to get it digitally paired to the vehicle. This is because modern keys need to be “paired” to a specific vehicle in order to function in a way that required expensive and complicated equipment that only dealers had access to. The EZ Installer by Car Keys Express simplifies the process of pairing up modern keys to vehicles for retailers and locksmiths. The EZ Installer is a simple, “plug and play” OBD device that pairs new keys to vehicles without the need for expensive equipment or programming tokens. It connects directly to the standard OBD port on the vehicle and utilizes an application that is mobile 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 work for a particular vehicle, refer to the compatibility guidelines on Tom's site. A money-back guarantee of 100% is offered if the device does not successfully program a remote or key purchased from Tom's for a compatible vehicle. Contrary to conventional programming equipment that costs retailers and key professionals thousands of dollars with typical per-key “token” fees, the EZ Installer Pro doesn't charge these fees at all, so it can be used as long as a retailer or key professional wishes to use it. The EZ Installer eliminates the need for expensive monthly service contracts and software updates. This allows retailers to save money while providing their customers the same high-quality service as OEM equipment. It also offers an industry-leading warranty that includes all software and hardware for the duration of its life. Tools Locksmiths, auto mechanics and owners of vehicles can utilize car key programming tools to create new keys for cars. These tools connect to a vehicle's immobilizer to program new keys and control them remotely. These tools can be used to make duplicate keys and to make keys cloned. These tools are a valuable tool for those who own a car. One of the most well-known 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 also has the ability to program keys and can backup current important information. It also resets the immobilizer or clear immobilizer fault code. Another tool that is essential for reprogramming car keys is the OTOFIX IMM1. This auto-diagnostic scanner has advanced functions comparable to OE and can read passwords from most major brands. It can even perform online calibration, customization, and EEPROM reading. It also comes with the ability to bypass the BMW or Mercedes PIN code. It is also able to 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 fantastic tool for auto repair shops and locksmiths because it can read codes and key data from most vehicles within seconds. It also has an active test function that can help identify the problem quickly and efficiently. There are a variety of ways to reprogram your car, it is essential to use the right tools and to know how to use them. A mistake in programming could damage the vehicle's immobilizer and stop it from beginning. It is advised to seek advice from a professional prior to trying to reprogram your car key. Another option is to purchase an entire kit that includes the key programmer, a remote control key, and transponder chips. This will ensure that you have everything you need to reprogram your car key. However, this method will take more time and requires a basic understanding of electronic circuits and soldering.