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Replace Nissan Key Fob Batteries If your Nissan keyfob doesn't respond to your commands, then its battery could be dead. This is a simple repair that the majority of people can do themselves. To replace the battery, you can either purchase a new one from a hardware store or consult your owner's guide for the model you have. Change the Battery The key fob in your Nissan model is equipped with a lithium battery built-in that will eventually lose its charge. The battery for the key fob can be changed in just a few minutes. First, you'll need purchase the replacement CR2032 3V battery. This is a small coin cell battery that is typically used in key fobs and it can be found at most convenience stores. You will also need gloves (latex or non-latex) and an affixed screwdriver that is small enough to open the fob. Refer to the owner's guide for specific instructions and steps to follow before you begin. Turn the fob upside down and look over the backside. There will be a small latch that you have to release by pulling down. This will open the mechanical key from its initial position inside the fob. Insert the new battery next and ensure it is properly positioned. Once the battery is placed, close the fob and then press the two sides together. After you have completed this step make sure to test your key fob by pressing the unlock button, and then seeing what happens. It's now possible to use the many functions of your Nissan If everything is working well. It's recommended to re-program your key fob after replacing the battery to make sure it's operating properly. Replacing the Transmitter Your key fob serves as the “key” to a myriad of your car's most important functions, it could be a huge loss when you lose or damage it. A damaged or dead key fob could prevent you from locking and starting your car. It's a good idea have a spare keyfob on to hand in the event of an emergency. Fortunately, the process of replacing your Nissan key fob is fairly easy. You'll need a new battery and a small flathead screwdriver to take out the old one The replacement process is a breeze and should only take about a couple of minutes. You'll also need a Panasonic CR2032 3V round battery (you can find them in multipacks, which cost under $5 USD). The battery is in the back half of the key fob. You'll need a small flathead screwdriver to gently split the two halves. Make use of a flathead screwdriver or a small flathead to take off the clip on the top of the battery. Be sure to note the place of placement. Replace the battery, then assemble the key fob. Test it to make sure it is working. As with all electronic devices, the Nissan Intelligent Key will eventually become worn out by regular use and will require replaced. Secure your key fob from magnetic fields, water and physical impacts. Don't drop it, or put too much pressure on the device. Replacing the Key If your Nissan key fob is dead, you can't use it to unlock or start your car. This is a major issue for those who need to go to work in Detroit or do errands in Dearborn. The good news is that the battery in your Nissan smart key isn't too difficult to replace. You can replace the battery at home, or at the dealership. The cost of a replacement pack is usually less than $5. Flip the fob upside down and push the small catch on the back. This will open the mechanical emergency key. While you won't have the ability to use the emergency key to start your vehicle it will let you open the door. Find a small slit on the top of the casing. These are the perfect place to insert screws into, allowing you to pry the two parts of the key fob. Once you've gained access to the battery within, pull it out and make note of its positioning. When you are in a position to reassemble your key fob, simply insert the new battery and snap the two parts of the case back together. Insert the mechanical key and your Nissan smartkey will work as usual. Other Issues Many modern cars come with key fobs that let you to lock them or start them without the need for a physical key. To accomplish this, the key fob uses small transmitters to communicate with the car's computer system. If your Nissan key fob does not function after you have changed the battery There could be many reasons to blame. For one, the new battery may not be properly placed within the key fob. A reset of the key fob is a different possibility. This is a straightforward process that can be completed at home with a few tools. For instance, you'll need a screwdriver, and preferably with a flat head to pry open the key fob and then remove the old battery. Then, you'll need an open-ended screwdriver the back of the key fob and insert the new battery. In the end, you'll have to change the programming of the key fob to ensure that it is compatible with your vehicle. Fortunately, most Nissan key fobs are user-programmable and you can accomplish this yourself. nissan key programming is usually done by inserting the keyfob in the ignition twice in five minutes. If this does not work, bring your key fob to a dealer or auto locksmith to have it programmed. The cost of this will vary depending on who you call and the type of vehicle you own.