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Nissan Car Key Replacement Replacing the Nissan key fob battery is generally an easy and straightforward process. But first you'll need to know if your car uses an intelligent fob, push to start button or regular remote/non-transponder key. You'll also need the key code that should be stored in a secure location and should match with the one that came with your vehicle. Transponder Keys Most often found in modern cars, transponder keys contain an RFID microchip embedded in the key that transmits a specific code to the car when it is installed in the ignition. It is designed to guard against theft by making sure that only the right key can start the vehicle. Contact your local dealer or locksmith to see the demonstration of this technology. When the transponder gets inserted in the ignition, the key transmits an information to the chip that is inside the engine control unit (ECU) of the vehicle. The ECU then examines whether or not the code in the key matches with its own digital serial number. If it does, the ECU will release the immobilizer so that the engine can start. If the code is not compatible to the code, then the ECU will deny the signal and prevent the engine from getting started. They're more expensive than the traditional metal keys, but they provide greater security. However car thieves have evolved over time and have found ways to get around this anti-theft system therefore the extra cost won't keep them from doing anything. Many people wonder if they can copy a transponder key themselves – the answer is yes, but it's best to leave it to professional auto locksmiths. The process can also vary dependent on the make and model of your car. G28 Car Keys came with mechanical keys. The traditional keys made of metal did not feature remote functions, and were capable of unlocking the doors and ignition cylinders on the car. Locksmiths can repair the inner parts of a damaged key or damaged case to make a replacement that works as good as new. A reputable and experienced auto locksmith can also cut keys at a cheaper price than the dealership. There are various kinds of mechanical key, and each has its own unique process for replacement. Linear switches are equipped with an actuation chart that is linear, for example. This means that when you press the key down it will move certain distance until it reaches the stopper or triggers an internal spring. When the key is pushed into the ignition the switch will send an electronic signal to the car to start it up. Intelligent keys have an internal chip that communicates with the vehicle's computer system. This means that if you lose your keys, it will have to be replaced with a new one that is programmed to work with your particular vehicle. This requires a more sophisticated key technology, which is only available through a specialized locksmith for automotive. It is more expensive than a standard key replacement at the dealership. Key Fobs Key fobs have become an integral part of many cars since the mid 1990s. You can unlock, lock and arm your car's alarm with the touch of a button. Many people believe that these systems are secure enough that only someone with your keycode can escape with your car. However, that's rarely the situation. With just a few steps, even the most sloppy of people are able to exploit these systems. It's possible to replace your Nissan key fob's batteries if they aren't functioning properly. The rechargeable CR2025 or CR2032 batteries used in most key fobs last for about two years. If you're not certain how to change the battery, consult the owner's manual for instructions. If your key fob doesn't work because of a more serious problem, it may need to be replaced or programmed. These issues could be more complex than an easy replacement of the battery and might require an auto locksmith's help. Some locksmiths specialize in replacing and repairing smart keys and will provide you with a OEM intelligent key at a cheaper cost than the dealer. They can also visit your home, saving you from having to leave your vehicle at a service centre. They are also available 24 hours a day, all week. Remotes There are Nissan models with a remote keyless entry system, that uses the key fob to open your door and/or to start the engine. It is recommended to have a spare for the event that yours is lost. A replacement key fob that works can save you from having pay for a tow or the cost of replacing your lost ignition keys. Fobs emit frequencies that communicate with the computer of the vehicle to perform a series of tasks such as locking and unlocking doors and trunk release, as well as the sounding of a panic alarm. Shop our selection of Nissan key fobs for replacement to find the perfect one for your specific model and year. You can also order one that is pre-programmed for an even lower cost. Be sure to choose the correct style, as several look similar and may cause confusion if they're not compatible. Online sellers who provide a preprogrammed keyfob usually require evidence of ownership or registration to prove legitimacy. Websites that do not require this information could be frauds.