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Can You Program Your Own Car Keys? There are a handful of automobiles on the market that let you program your own keys. This is a risky process that can damage your car's computer. The transponder chip within the key creates a digital signature. The car's database of these signatures and matches them to start the car. How to program a Keyless Entry System A key fob lets you to lock and unlock your vehicle without having to use traditional keys. It transmits radio signals to the vehicle, which then activates the onboard locking and ignition systems. The signal also enables the car to identify the key fob's ID to determine whether or not you are close enough to be able to open and operate the doors and trunk. These systems can be programmed at home, however the procedure may differ between manufacturers and vehicles. Some manufacturers employ a basic RF (radio-frequency) programming method, whereas others require specialized equipment to access the system's internal memory. It's important to follow the steps with care in order to avoid a mistake or performing it incorrectly could result in failure to program the new fob. Benefits of Keyless Entry Remote keyless entry is a great option for those who own a lot of cars. It is easy for drivers and can save them time and reduces the risk of theft. Additionally it is usually easier to manage fleets using remote keyless entry systems with integrated software for managing vehicles. A keyless entry system also offers significant security benefits since it's far more difficult to duplicate a digital key than physical keys. In addition, most newer vehicles feature a built-in alarm that informs the driver of any unauthorized attempts to start or operate the engine. How to Program a Fob for a Key Fob The first step in programming a key fob is to make sure you have the right kind of key. Blank key fobs are available on the internet or at most auto dealerships. They must be made specifically for the particular make and 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. Once you have the right key, follow these steps to start programming mode: Step into your vehicle on the driver's side and shut all of its doors except for the driver's door. Insert and remove the ignition key multiple times until the hazard lights flash. This means that you are in the programming mode and your vehicle is ready to accept a new fob. Repeat the process for each of the new fobs you wish to program. How do I program a Keyless Entry Remote They are convenient and useful, but can be a headache when they aren't working properly. Replace the battery if the one you have isn't functioning. This will usually fix the problem, but if that doesn't work then you should think about taking your vehicle to professional. While the process is different based on the model and make of the vehicle however, it is possible to program your own key fobs without having to visit a dealer for assistance. However, car key programming is important to know that not all vehicles allow self-programming and you will need to consult the owner's manual or search for your specific vehicle online for detailed instructions. 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. Then, you'll need to get inside your vehicle and close all doors. Press and hold the lock button on one of your new key fobs for a couple of seconds. You'll need to wait until your car responds to the request. This is usually accomplished by cycling the locks, or emitting a sound. When you hear the locks cycling or chime, you can then begin programming your additional fobs. Repeat the process for each fob that you have to program, making sure that you complete the process within the specified time frame of the vehicle. Once you are done check the fobs to ensure that they function as intended. If the fobs are not functioning properly, you'll have to repeat the procedure or consult an expert. If you have problems with your Mercedes it could be necessary to take it to a Mercedes dealer to reprogram the keys. The reason is that the process of reprogramming Mercedes requires specialized equipment which most people don't have. If you can locate an Eeprom Locksmith in your area, they might be able to help to program the Mercedes key fob.