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Nissan Car Key Replacement Replacing the Nissan key fob battery is generally an easy and quick 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 need your key code, which you must keep safe and must match the one of your vehicle. Transponder Keys Commonly found in newer vehicles transponder keys usually contain an RFID microchip embedded in the key which transmits a unique code to the car every time it is put into the ignition. It is designed to prevent theft by making sure that only the correct key is able to start the vehicle. Contact your local dealer or locksmith for the demonstration of this technology. When the transponder key is inserted in the ignition, it transmits an electronic signal to the chip inside the vehicle's engine control unit (ECU). The ECU determines if the code on the key matches the digital serial number of the ECU. If it does, the ECU disables the immobilizer in order so that the engine can start. If the code is not match, then the ECU will block the signal and prevent the engine from getting started. They're more expensive than traditional keys made of metal but they are safer. However car thieves have developed in the past and discovered ways around this anti-theft measure and the additional cost won't dissuade them completely. Many people ask if they can duplicate a transponder key themselves – the answer is yes however, it is best to leave the job to professional auto locksmiths. Furthermore, the procedure can differ based on your vehicle's model and make. Mechanical Keys Many older Nissans were equipped with mechanical keys. These keys, which were made of metal, were not equipped with remote functions and were only used to unlock the doors of the car and the ignition cylinders. Locksmiths can replace the inside components of a broken key or a damaged case to create a key replacement that works as good as new. A reputable, experienced and reputable auto locksmith is also able to make a new key for a much lower cost than the dealership will charge. There are a variety of mechanical keys each with its own unique process for replacement. Linear switches, for example come with a linear-actuation graph. When you press the key down it will move until it comes to a stopper. The switch will send the signal to start the car once the key is introduced into the ignition. Intelligent keys contain a chip in them that communicates with the computer system of the vehicle. If you lose your keys, it must be replaced with a new key that is programmed for the vehicle. This requires a higher degree of key technology that can only be obtained from a specialized automotive locksmith, and will cost more than a regular replacement key from the dealership. Key Fobs Key fobs have become an essential feature in many automobiles since the end of the 1990s. You can unlock, lock or arm your car's alarm system with the click of a switch. Many people believe that these systems are safe enough that only those with your key code can leave your car. Unfortunately, that's not always the situation. It is possible for less cautious individuals to profit from these systems in a few easy steps. If your Nissan's key fob has stopped working as it should, you might require replacing the battery. Most key fobs have rechargeable CR2025 and CR2032 batteries, and they usually last about two years. If you're not certain how to replace the battery, refer to the owner's manual to get advice. If your key fob doesn't function due to a major issue, you may need to replace or program it. These issues can be more complicated than simply replacing the battery and could require an auto locksmith's help. Certain companies specialize in replacing and repairing smart keys, and can offer you an OEM smart key at a much lower price than the dealership. The KeyLab can also deliver the key to your house, preventing you from having to leave your vehicle at a service center. They are open 24 hours a days and 7 days a week. Remotes Certain Nissan models have a remote keyless system that uses a keyfob to unlock the door and/or start the engine. Having a spare key in case you lose yours is highly recommended. A key fob replacement that functions can help you avoid having to pay for a tow and the expense of replacing your ignition keys. Fobs emit a frequency that communicates with the computer in the vehicle to complete a series of actions, including locking or unlocking the doors and activating the trunk release, or triggering the panic alarm. Shop our selection of Nissan replacement key fobs to find a match for your specific model and year. You can also purchase an already-programmed key fob which is a more affordable option. Be sure to choose the correct style, since many look similar and can create headaches if they're not compatible. Additionally, online sellers that offer a pre-programmed device typically require proof of ownership or registration to prove authenticity. Beware of websites which do not require this information and may be scams.