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Can You Program Your Own Car Keys? There are only a handful of vehicles available that let you program your own keys. This is a risky process that could cause damage to the car's computer. The transponder chip within the key creates a digital signature. The car's database of these signatures and then matches them to start the car. How to program transponder key programming With a key fob you can lock and unlock your vehicle without the use of the traditional car keys. It transmits radio signals to the vehicle, which will then activate the ignition and locking systems that are built into the car. The signal also allows the car to identify the key fob's ID and determine whether or not you are close enough to operate the doors and trunk. The systems can be programmed at home, however the procedure may differ between vehicles and manufacturers. Some manufacturers use a radio frequency (RF) reprogramming technique however others require special equipment to access the internal memory of the system. It is essential to read and be sure to follow the steps carefully in order to avoid a mistake or doing it incorrectly can cause the failure to program the new fob. Keyless Entry Benefits For those who must frequently operate vehicles remote keyless entry provides a number of advantages over traditional keys. It saves time and provides greater convenience for drivers and reduces the possibility of theft. It can also be easier to manage fleets with a remote keyless system which integrates with vehicle management software. A keyless entry system also provides significant security advantages, as it's much more difficult to duplicate a digital than a physical key. The majority of modern vehicles have an alarm system that informs the driver when the engine is started or operated by a different person. How do you program a key fob To program a keyfob, you must first make sure you have the correct type of key. Blank key fobs can be purchased on the internet or at many dealerships for cars. They must be designed specifically for the particular make and model of the vehicle to which they will be added. This information can be found on the key fobs or by searching for the vehicle's VIN. Once you have the correct key, follow these steps to start programming mode: Step into your vehicle from the driver's side, and close all the doors, with the exception for the driver's door. Insert and remove the key from the ignition multiple times until the hazard light flash twice. This indicates that you are in programming mode and the vehicle is ready to accept an additional fob. Repeat the process for each of the new fobs that you wish to program. How to Program a Keyless Entry Remote They're convenient and useful however they can also be a nuisance when they aren't working properly. Replace the battery if yours isn't working. If this doesn't fix the problem then you might need to take your vehicle to an expert. Although the procedure varies based on the model and make of the vehicle, it is possible to program your own key fobs, without needing to take them to a dealer for assistance. It is important to note that not all cars can be programmed by themselves. You will need to go through the owner's manual of your car or go for specific instructions. First, you'll need to gather all of the fobs that you wish to program and keep them in a convenient location. Most vehicles will erase all previously programmed fobs in the programming process so it is important to ensure that they are in the vicinity prior to starting. Then, you'll need to get inside your vehicle and shut all the doors. Press and hold the button to lock on one of your new key fobs for a few minutes. You will need to wait until your vehicle responds to your request. This is usually done by cycling the locks or emitting the sound. If you can hear the locks cycle or sound, you can begin programming your additional fobs. Repeat the procedure for each fob that you have to program, ensuring that you do so within the timeframe of the vehicle. After you have completed the process check the fobs to ensure that they function as intended. If the fobs aren't functioning correctly, you will need to repeat the process or consult with an expert. If you're experiencing issues with your Mercedes, it may be necessary to bring it to a Mercedes dealer in order to program the keys. This is because reprogramming an Mercedes requires special equipment that many do not have access to. However, if you're located near an Eeprom locksmith, they may be able to help you programme your Mercedes key fob.