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Can You Program Your Own Car Keys? There are only a few cars that are available allow you to program your own keys. This is a risky procedure that can damage the computer in your car. The transponder chip in the key creates an electronic signature. The car's database of these signatures, and then matches them to start the car. How to Program a Keyless Entry System With a key fob you can lock and unlock your vehicle without using the traditional car keys. It transmits radio signals to the vehicle, which is then used to activate the onboard locking and ignition systems. The signal allows the car's identification to be read so it can determine that you are near enough to be able to open the doors and trunk. The systems can be programmed at home, however the process can vary between different manufacturers and vehicles. Some manufacturers employ a simple RF (radio-frequency) reprogramming method while others require specialized equipment to access the system's internal memory. It is essential to follow the steps carefully, as missing a step or doing it incorrectly could cause the failure to program the new fob. Benefits of Keyless Entry Remote keyless entry is a great option for those who drive lots of vehicles. It saves time and provides greater convenience for drivers and reduces the possibility of theft. In addition it is generally easier to manage fleets using remote keyless entry systems with integrated software for managing vehicles. The security advantages of keys that are not inserted into the system are also noteworthy, since it is much more difficult to duplicate a digital key than an actual one. In addition, most modern vehicles have an inbuilt alarm that informs the driver of any illegal attempts to start or operate the engine. How do you program a Fob for a Key Fob To program a key fob, first, you need to ensure that you have the correct type of key. Key fobs that are blank are available online or at most automotive dealerships. They must be designed specifically for the make and the model of the vehicle to which they are to be attached. You can find this information on the key fobs themselves or by looking up your vehicle's VIN. If you have the correct key, follow these steps to enter the programming mode. Step into your car on the driver's side. Close all doors except the driver’s door. Insert and remove the key from the ignition several times until the hazard light flash twice. This indicates that you're in programming mode and the vehicle is now ready to accept a new fob. Repeat this process for each new fob you'd like to program. How to Program a Keyless Entry Remote? They're convenient and useful but they can be a nuisance in the event that they don't function properly. If you notice that yours is malfunctioning, the first thing you need to try is replacing the battery. If this doesn't solve the issue it could be necessary to take your vehicle to an expert. While the process varies depending on vehicle make and model however, it is possible to program your own key fobs, without needing to take them to an auto dealer. It is important to note that not all cars are programmable by themselves. You will need to consult the owner's manual for your vehicle or go on the internet for specific directions. You will need to first gather all the fobs that you would like to program, and keep them in a safe place. It is crucial to make sure that you have all the fobs you wish to program close to hand before you begin. You'll then have to enter your vehicle and close all the doors. Press and hold the lock key on one of your new key fobs for a few seconds. You'll have to wait until your car responds to the request. This is usually done by cycling the locks, or emitting a sound. If you hear a chime, or the locks are cycling, you can start programming the additional fobs. Repeat the process for each fob. Make sure you follow the time limit specified by the vehicle. Once you are done check the fobs to verify that they function properly. If the fobs are not functioning correctly, you will need to repeat the process or seek advice from a professional. If you have problems with your Mercedes it may be necessary to take it to a Mercedes dealer to reprogram the keys. The reason is that the process of reprogramming Mercedes requires special equipment, which the majority of people don't have. However, if you're able to find a local Eeprom locksmith, they may be able to help to program your Mercedes key fob.