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Nissan Car Key Replacement Replacing the Nissan key fob battery is usually a quick and simple 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 require your keycode, which you should keep in a safe place and must match the one of your car. Transponder Keys Transponder keys are typically found in more modern vehicles. They have an RFID microchip that emits a unique car number when the key is inserted into the ignition. It is designed to ensure that only the right key can be used to start the engine and stop theft. Contact your local dealer or locksmith to view a demonstration of this technology. When the transponder gets inserted into the ignition, the key transmits a message to the chip inside the engine control unit (ECU) of the vehicle. The ECU examines if the number on the key is compatible with the serial number of the ECU. If it does it, the ECU will then release the immobilizer, allowing the engine to start. If the code does not in line with the ECU will block the signal and prevent the engine from starting. They're more expensive than traditional metal ones, but they provide greater security. The cost of these keys is higher than traditional keys made of metal, but they provide more security. Many people wonder if they can copy a transponder key by themselves. The answer is yes but it's best to leave it to professionals who can help you. The process can also vary depending on the brand and model of your car. Mechanical Keys Many older Nissans had mechanical keys. These keys, which were made of metal, did not come with remote functions, and could only be used to unlock the doors of the car and the ignition cylinders. A locksmith can change the internal components of a broken key or a damaged case and create a new key that functions exactly like new. A licensed and reputable auto locksmith can also cut you keys at a cheaper cost than a dealership. There are several types of mechanical keys, each of which has their own distinct replacement procedure. Linear switches, for example have a linear actuation graph. This means that, as you press the key down, it will move a certain distance until it reaches the stopper or triggers an internal spring. When the key is put into the ignition the switch will send an alert to the car to turn it up. Intelligent keys are equipped with an electronic chip that communicates with the computer system of the vehicle. This means that if you lose your key it will have to be replaced with a brand new one that has been programmed to work with your specific vehicle. This requires a more sophisticated key technology, which is only available through a specialist locksmith for cars. It will cost more than a regular key replacement at the dealership. Key Fobs Since the late 1990s key fobs became a standard in the majority of cars. You can lock, unlock and arm your car's alarm at the click of a switch. Many people believe that these systems are safe enough that only those with your key code could drive away with your car. Unfortunately, this isn't always true. It's possible for less scrupulous individuals to exploit these systems with the simplest of steps. If your Nissan's key fob doesn't function as it should, you might need to replace the battery. Most key fobs are powered by rechargeable CR2025 and CR2032 battery. They usually last about two years. If you're not certain how to replace the battery, consult your owner's manual to learn more. If your key fob won't turn on due to a more serious issue, it might need to be replaced or programmed. These issues can be more complicated than an easy replacement of the battery and might require the assistance of an auto locksmith. Some companies specialize on repair and replacement of intelligent keys and will provide you with an OEM intelligent key for a lower cost than the dealer. keyless ignition are also able to come to you, saving you the headache of leaving your vehicle in an auto repair shop. They are available 24 hours a days, 7 days a weeks. Remotes Certain Nissan models come with a remote keyless system that makes use of keys to open the door and/or to start your engine. A spare key in case you misplace your key is highly recommended. A functional replacement key fob can save you the expense of a trip to the dealership for a tow and the hefty fee to replace the ignition keys that you lost. Fobs emit frequencies that communicate with the car's computer to perform tasks such as locking and unlocking doors opening trunks, activating trunk release and sounding panic alarm. Browse our selection of Nissan key fobs for replacement to find a match for your particular model and year. You can also purchase one that is pre-programmed for an even lower cost. Make sure you select the correct design, as they all look alike and could cause confusion if they're not compatible. Online sellers that provide preprogrammed keys usually require evidence of ownership or registration to confirm legitimacy. Websites that do NOT require this information could be frauds.