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Can You Program Your Own Car Keys? There are a handful of cars on the market that let you program your own keys. This is a risky process that could cause damage to the car's computer. The transponder chip in the key does a digital signature. The car's memory holds these signatures and matches them to allow the car to start. How to Program a Keyless Entry System With a key fob, you can lock and unlock your vehicle without using a traditional car key. It transmits radio signals to the vehicle, which is then used to activate the ignition and locking systems that are built into the car. The signal allows the car's identification to be read so it can determine if you are close enough to be able to open the doors and trunk. These systems can be programmed at home, however the process can vary between different manufacturers and vehicles. Some manufacturers use a simple RF (radio-frequency) method of reprogramming, while others require special equipment to access the system's internal memory. It is important to read the instructions carefully and follow them. Missing a step or performing the procedure incorrectly could result in the new device not being reprogrammed. Keyless Entry Benefits If you need to frequently drive a fleet of cars remote keyless entry has a number of advantages over traditional keys. It saves time and provides improved convenience for drivers, while reducing the risk of theft. It can also be easier to manage fleets using a remote keyless system that incorporates vehicle management software. The security advantages of keyless entry systems are also notable, as it is much more difficult to duplicate the digital key than a physical one. The majority of newer vehicles come with an alarm system that alerts the driver if the engine is started or operated by a different person. How do you program a Key Fob To program a keyfob you must first ensure that you have the correct key. Key fobs in blank form can be purchased on the internet or at most automotive dealerships. However they must be designed for the model and make of the vehicle to which you wish to add them. This information is available on the key fobs themselves or by searching for the vehicle's VIN. Once you have the correct key, follow these steps to enter programming mode: Get into your vehicle from the driver's side and shut all of its doors except for the driver's door. Insert and take out the ignition key a few times until both hazard lights are flashing. This means you are in program and your vehicle is now ready to accept a brand new key fob. Repeat the procedure for all of the new fobs you would like to program. How do I program a Keyless Entry Remote Car key fobs are handy and useful however, they can be a hassle if they are not working correctly. If you notice that yours is malfunctioning the first thing you should try is replacing the battery. This is usually able to fix the problem, but if that doesn't work it is recommended that you take your car to professional. It is possible to program key fobs yourself according to the model and make of the vehicle. It is not necessary to bring them to dealers. However it is important to know that not all vehicles allow self-programming. You will have to refer to your owner's manual or look up your vehicle on the internet for more detailed instructions. First, you'll need to gather all the fobs that you want to program and keep them close by. Most vehicles erase all previously programmed fobs during the program process, which is why it is essential to ensure that they are in the vicinity prior to beginning. After that, you'll 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 couple of seconds. You will need to wait until your car responds to the request. This is usually accomplished by cycling the locks, or emitting a sound. If you hear a chime or locks are cycling, you may start programming the additional fobs. Repeat the procedure for each fob that you want to program, making sure you complete the process within the specified time frame of the vehicle. Check the fobs after you've completed the process to ensure they function as intended. If the fobs don't perform as expected, you may need to repeat the procedure or seek out an expert. If you're having problems with your Mercedes it may be necessary to take it to a Mercedes dealer to program the keys. This is because the process for changing the programming of an Mercedes requires specialized equipment that most people do not have access to. However, if G28CarKeys are located near an Eeprom locksmith, they may be able to help you programme your Mercedes key fob.