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Can You Program Your Own Car Keys? There are only a handful of automobiles on the market which allow you to program your own keys. However, doing this is extremely risky and may cause damage to the computer in your car. The transponder chip inside the key creates an electronic signature. The car is equipped with a library of these signatures and matches them for the car to start. How to Program Keyless Entry Systems? With a key fob, you can lock and unlock your vehicle without a traditional car key. It transmits radio signals to the vehicle, which trigger the locking system onboard and ignition. The signal allows the vehicle's identification to be read, so that it knows that you are near enough to be able to open the trunk and doors. These systems can be programmed at home, however the procedure can differ between vehicles and manufacturers. Certain manufacturers employ a radio-frequency (RF) method of reprogramming and others require specialized equipment to access the internal memory of the system. It's important to read and be sure to follow the steps carefully and follow the steps carefully, as omitting a step or doing it incorrectly could result in failure to program the new fob. Keyless Entry Benefits Remote keyless entry is a fantastic option for those who own lots of vehicles. It reduces time and offers greater convenience for drivers while reducing the risk of theft. Furthermore it is generally easier to manage fleets when using a remote keyless entry system with integrated vehicle management software. Keyless entry can also provide significant security benefits because it's more difficult to duplicate a digital than physical keys. In addition, most modern vehicles have an inbuilt alarm that informs the driver of any illegal attempts to start or operate the engine. How to program a Fob for a Key Fob To program a keyfob you must first make sure you have the correct key. Key fobs that are blank can be purchased online or at most automotive dealerships. But they must be made for the specific make and model of the vehicle you'd like to add them. This information is available on the fobs for keys or by searching for your vehicle's VIN. After you have the right key, perform the following steps to start programming mode: Step into your vehicle from the driver's side and shut all the doors, with the exception for the driver's door. Insert and remove the key from the ignition multiple times until the hazard lights flash twice. This means you are in the process of programming and your vehicle is now ready to accept a brand new key fob. Repeat the process for each of the new fobs you wish to program. How do you program a keyless entry remote? They're convenient and useful, but can be a nuisance if they don't work correctly. Replace the battery if it isn't working. This is usually able to fix the problem, but if that doesn't work, you should consider taking your car to a professional. While the process varies depending on vehicle make and model, it is possible to program your own key fobs without having to visit a dealer for assistance. However it is important to note that not all vehicles allow self-programming and you will need to consult your owner's manual or look up your specific vehicle online to find the exact instructions. First, you'll need to gather all the fobs that you wish to program and keep them nearby. Most vehicles erase previously programmed fobs during the program process so it is important to keep them in place prior to starting. You will then need to enter your vehicle and shut all the doors. Press and hold the lock key on one of your new keys fobs for a few seconds. You will need to wait until your vehicle responds to your request. This is usually accomplished by cycling the locks, or emitting a sound. If you hear a chime, or the locks are cycling, you may begin programming additional fobs. Repeat the process to program each fob. Make sure you follow the time limit specified by the vehicle. Check the fobs after you have finished to ensure they function properly. If the fobs fail to work properly, you may have to repeat the process or consult an expert. If you're having problems with your Mercedes it could be necessary to take it to the Mercedes dealer to program the keys. reprogram car key is because the process for changing the programming of a Mercedes requires special equipment that the majority of people do not have access to. If you find an Eeprom Locksmith in your area, they may be willing to help you to program the Mercedes key fob.