Replace Nissan Key Fob Batteries
If your Nissan keyfob doesn't respond to your commands, its battery might be dead. It's an easy fix that most people can complete themselves.
You can find an alternative from a hardware store or the owner's guide for the specific model you have, and you'll need to follow these steps to replace the battery.

Changing the Battery
The key fob in your Nissan model is equipped with a built-in lithium battery that eventually loses its charge. The key fob battery can be replaced 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 is available at all convenience stores. To open the key fob, you will also need a pair (latex or not) of gloves and the small screwdriver flathead. Before beginning, be certain to read the owner's manual to find specific steps and instructions.
Turn the fob upside down and look at the backside. There will be a small latch that you need to open by pulling down. This will open the mechanical key from its initial position inside the fob.
Next, insert the new battery and ensure that it's positioned correctly. Close the fob when the battery is installed and press the two sides of the fob together. Check the fob's functionality after you've completed this step by pressing the unlocking button. You can now use the many features of your Nissan If everything is working correctly. After changing the battery, it's a good idea to reset your key fob to make sure that it functions correctly.
Replacing the Transmitter
With your key fob serving as the "key" to many of your car's essential functions, it could be a big blow if you misplace or damage it. If your key fob is dead or damaged key fob, you'll find yourself without the ability to lock and start your vehicle.
Therefore, it's a smart idea to keep an extra key fob in the event of an emergency. Luckily, the process of replacing your Nissan key fob is simple. You'll require a new battery and a small flathead screwdriver to remove the old one The replacement process is very easy and should only take a few minutes.
You'll also require a Panasonic CR2032 3V round battery (you can purchase them in multipacks priced less than $5 USD). The battery will be located inside the key fob's back half and you'll need to gently push the two halves in order to expose it. Utilize a flathead screwdriver and small flatheads to remove the clip on the top of the battery. Be sure to note the location. Replace the battery, and then put it back together to form the key fob. Make sure to test it to verify it is working.
As with any electronic device that you own, the Nissan Intelligent Key will eventually wear out due to regular use and need to be replaced. Secure your key fob from magnetic fields, water and physical impacts. Be careful not to drop it or apply too much pressure to the device.
Replace the Key
If your Nissan key fob is lost, you cannot use it to unlock your car or even start it. That's a problem for people who must get to work in Detroit, run errands near Dearborn, or spend a night on the town close to Troy.
It's not hard to change the battery on your Nissan Smart Key. You can do it at home or at a dealership, and you'll typically find a set for $5 or less at the hardware store.
Begin by flipping the fob on its side and pushing a small latch on the back. This will trigger the mechanical emergency key. The emergency key will not allow you to start your vehicle however, it will allow you to open the door.
Then, look for a small opening on the top of the key fob casing. These are perfect to insert screws into, allowing you to pry the two parts of the key fob apart. Once you've reached the internal battery, you can remove it and note its position. When you are in a position to reassemble your key fob, slide in the new battery and then snap the two components of the case back together. Insert the mechanical key and your Nissan smartkey will work as usual.
Other Issues
A lot of modern cars come with key fobs which allow you to lock and unlock them without having a physical car key. Key fobs use the transmitter to communicate with the computer system of the car.
If G28 Car Keys working after you have changed the battery, there could be several reasons for this. One reason is that the new battery may not be properly seated in the key fob. Resetting the key fob is a different possibility. Fortunately, this is an easy procedure that can be completed at home using some simple tools.
You'll require, for instance an screwdriver with flat-headed tips to remove the old battery from the key fob. After that, using a screwdriver, pull the back of the keyfob open and then insert the new batteries. You'll also have to reprogramme your key fob for it to work with your vehicle.
You can easily program your Nissan key fob on your own, since they're all user-programmable. This is usually accomplished by inserting the fob into the ignition two times in five seconds. If this does not work then you should take the key fob to an auto locksmith or dealer to have it programmed. The cost of this service will differ based on the person you talk to and the kind of car you have.