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Nissan Car Key Replacement Nissan key fob batteries are easy to replace. 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 key code, which you should keep safe and should match the one in your vehicle. Transponder Keys Transponder keys are often found in modern vehicles. They come with an RFID microchip that transmits a unique vehicle code when keys are inserted into ignition. It is designed to ensure that only the correct key can be used to start the engine and also prevent theft. If you'd like to find out more about how this technology works and how it works, call your local locksmith or dealership to schedule demonstrations. When the transponder is inserted in the ignition, it sends an electronic message to the chip inside the engine control unit (ECU) of the vehicle. The ECU determines if the code on the key matches the serial number digital of the ECU. If it does it, the ECU then disengages the immobilizer and permits the engine to begin. If the code doesn't match it, the ECU will reject it and prevent the engine from beginning. These keys are more costly than the traditional metal keys, however, they are more secure. The cost of these keys is more expensive than traditional metal keys however, they provide greater security. Many people wonder if is possible to duplicate the transponder keys themselves. The answer is yes. But, it's better to leave it up to auto locksmiths. Additionally, the process could differ based on your vehicle's make and model. Mechanical Keys Many older Nissan cars came with mechanical keys. These traditional metal keys did not feature remote functions, and were only capable of unlocking the doors and the ignition cylinders of the vehicle. If your key is damaged or breaks, the case is damaged, a locksmith can usually replace the inner parts and make a new one that functions as new. A reputable and certified auto locksmith can also cut a key for a lower cost than the dealer. There are several types of mechanical keys, each of which has their own distinct replacement procedure. Linear switches, like, have a linear actuation graph. This means that, as you push the switch down it will move down a certain distance until it reaches a stopper or actuates 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 contain chips that communicate with the computer system of the vehicle. If you lose your key it will need to be replaced by a new one that has been programmed to work with the vehicle. This requires a higher level of key technology that can only be obtained from a specialized automotive locksmith, and will cost more than a regular replacement key would at the dealership. Key Fobs Key fobs have become an everyday feature in the majority of cars since the late 1990s. You can lock, unlock and arm your car's alarm at the push of a button. Many people believe that these systems are so secure that only someone who has your key code will be able to leave your car. But this isn't always true. In a few simple steps, people who aren't terribly careful can exploit these systems. If your Nissan's key fob isn't functioning as it should, you might require replacing the battery. Most key fobs use rechargeable CR2025 or CR2032 battery. They usually last about two years. If you're not sure how to change the battery, consult your owner's manual to learn more. If your key fob isn't functioning due to a larger problem, it may need to be replaced or programmed. These issues may be more complex than a simple replacement of the battery, and may require an auto locksmith's help. Some locksmiths specialize in fixing and replacing intelligent keys and can supply you with an OEM intelligent key at a lower price than the dealer. They are also able to visit you, saving you the burden of having to leave your vehicle in an establishment for service. They are also available all hours of the day, all week. Remotes There are some Nissan models that have a remote keyless entry system which uses keys to unlock your door and/or turn on the engine. Having a spare key in case you misplace yours is highly recommended. A key fob replacement that works can save you from having to pay for towing and the expense of replacing your ignition keys. Fobs emit frequencies that communicate with the vehicle's computer to perform a variety of tasks like locking and unlocking doors opening trunks, activating trunk release and the sounding of a panic alarm. Browse our assortment of Nissan key fobs for replacement to find the right one to your specific model and year. replace nissan key fob can also buy a pre-programmed key fob for an even more affordable option. Make sure you select the right style, as they all look alike and could cause confusion if they're not compatible. Online sellers who offer a preprogrammed key fob usually require proof of ownership or registration to prove authenticity. Sites that do not ask for this information may be scams.