Nissan Car Key Replacement
Nissan key fob batteries are simple 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 also require your key code which should be stored in a secure location and should match the one that came with your car.
Transponder Keys
A lot of the time, in newer automobiles, transponder keys include an RFID microchip in the key that transmits a specific code to the car every time it is inserted into the ignition. It is designed to ensure that only the right key is able to start the engine and also prevent theft. If you want to know more about how this technology works call your local locksmith or dealer to schedule demonstrations.
When the transponder keys are inserted into the ignition, it sends a signal to the chip inside the engine control unit (ECU). The ECU then examines whether the code contained in the key matches its own digital serial number. If it does, the ECU removes the immobilizer to allow the engine to start. If the code isn't compatible then the ECU will block 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 higher than traditional metal keys but they offer greater security.
Many people ask if they can duplicate a transponder key at home - the answer is yes but it's best to leave the job to professional auto locksmiths. The procedure may also differ depending on the make and model of your car.
Mechanical Keys
Many older Nissans came with mechanical keys. These keys, which were made of metal, did not come with remote functions and were used to open the doors of the vehicle and the ignition cylinders. Locksmiths can repair the inner components of a broken key or damaged case to create a key replacement that works just like the original. A reputable and certified auto locksmith can also cut a key for a lower cost than the dealership.
There are a variety of types of mechanical keys each with its own unique replacement method. Linear switches have the ability to operate in a linear manner, for instance. As you press the key down it will move until it hits the stopper. When the key is pushed into the ignition the switch will send an electronic signal to the car to start it up.
Intelligent keys are equipped with chips that communicate with the computer system of the vehicle. This means that when you lose your key, it will have to be replaced with a new one that has been programmed to work with your particular vehicle. This requires a higher degree of technology in the key that can only be obtained from a specialist automotive locksmith and will cost more than a regular replacement key at the dealership.
Key Fobs
Key fobs have become an everyday feature in the majority of cars since the late 1990s. You can unlock, lock or arm your car's security alarm with the click of a switch. Many people believe that the systems are secure enough that only someone who knows your code can drive off with your vehicle. Unfortunately, that's not always the case. In a couple of easy steps, people who aren't terribly careful are able to exploit these systems.
If your Nissan's key fob isn't working as it should, you might need to replace the battery. The rechargeable CR2025 and CR2032 batteries that are used in the majority of key fobs last for about two years. If you're unsure of how to change the battery, consult your owner's manual to learn more.
If your key fob isn't working because of a more serious issue, it could need to be replaced or programmed. These issues are more difficult to repair than replacing a battery, and might require the assistance of a professional auto locksmith. Some locksmiths specialize in repairing and replacing smart keys, and they can provide you with an OEM intelligent key for a much lower price than the dealership. They are also able to come to you, saving you the inconvenience of having to drop off your vehicle at an auto repair shop. They are available 24 hours a days, 7 days a weeks.
Remotes
There are Nissan models that come with a remote keyless entry system , which makes use of keys to unlock your door and/or turn on the engine. It is recommended to have a spare for the event that yours is lost.
A working replacement key fob will help you avoid the cost of a trip to the dealership for a tow, as well as the pricey replacement cost for your ignition keys. Fobs emit a sound that communicates with the car's computer to complete a sequence of tasks, such as locking or unlocking the doors and activating the trunk release, or triggering the alarm that sounds the panic alarm.
Browse our selection of Nissan replacement key fobs to find a suitable fob to your specific model and year. You can also buy a pre-programmed fob for an even cheaper option. Make sure you select the correct style, as some look similar and can cause problems if they are not compatible. Online sellers that offer a preprogrammed key fob typically require proof of ownership or registration to prove authenticity. Be wary of websites which do not require this information and could be scams.