Why Nissan Key Fob Not Working After Battery Change? (Fixed)

Most Nissan car owners prefer to use the key fob instead of the old-fashioned keys due to the high functionality and convenience. However, key fobs can act up sometimes after a battery change.

In most cases, this fault lies with using a flat battery. Simply replace the old battery with a new working one and the fab should work just like when it was brand new. 

However, if the problem doesn’t lie in a flat battery but due to a different issue, it is illogical to throw away the entire battery. So what should we do exactly? Well, keep reading to know more!

Why Does the Nissan Key Fob Not Working After Battery Change?

There could be several reasons behind why exactly your Nissan key fob might malfunction after you have just changed the battery. Do note that while battery problems might exist human errors can also exist. 

We have compiled some of these reasons for the key fob to malfunction below along with their short details. So let’s get into the compilation without further ado.

Issue With the New Battery

Most of the time the key fab could refuse to work if you replace the old worn-out battery with another flat battery. 

Additionally, sometimes new batteries might have leaked, causing them to run out of energy. 

Dirty Contact Points

If the contact point between the battery and the fob is dirty, the connection will not be established. As a result, the fob will not receive the power needed for working.   

Wrong Type of Battery

Another more common reason behind the fob not working would be the usage of the strong type of battery. 

For instance, if you use a Na-ion battery when the fab requires a Li-ion battery, it might not work properly.

Misplacement Of The Battery

We have already mentioned human errors earlier. This point falls under human error since there is nothing wrong with the battery, to begin with. It involves not placing the battery in the right place or location properly. 

Wrong Terminals

Placing the battery along the wrong terminals is another error based on the judgment of humans. 

When you place the +ve terminal battery along with the +ve terminal of the fob or vice versa, the Nissan key fob will never work. 

This is because the electrons will always flow from positive to positive between two mediums and never from the positive of one medium to the negative in another medium. 

How To Fix Nissan Key Fob Not Working After Battery Change?

Now that we are done with what exactly causes the problem, we can move on to fixing the Nissan key fob when it malfunctions after changing your battery to a new one.

Below we have compiled a step-by-step guide that you follow to fix this issue and make your key fob work as good as new.

Step 1: Open The Cover

First, open the cover of the fab where the batteries are situated. You can make use of a screwdriver with the smaller top size since the screws on a fab are usually small. 

Additionally, make sure that you are in a well-lit area since you might find it hard to do the task if you are in a dark place. 

Step 2: Check for electricity

Take the battery out and check it for power. You can do this by either connecting it to an ammeter or to a circuit connected to a light bulb. 

If the ammeter of the bulb shows a reaction, there is electricity on the battery. 

If the ammeter or bulb shows no reaction, the battery is probably flat. You should get a new battery right now.

Step 3: Clean the dust on the contact points

Once you have got a new battery of the right kind, make sure to notice whether the contact point is clean. If not, clean it up. Do the same thing for the contact points on the fob.

Step 4: Step up The New Battery

If both contact points have been cleaned, you can fix the battery to the proper place in the fab. Make sure that the terminals are set in the right position. Positive to positive and negative to negative. 

What Is The Right Battery Size Compatible With Nissan Key Fob?

Not using the right key size in your key fob is one of the most common sources of problems that are associated with malfunctioning key fobs. 

If you want to find out the right kind of battery/s for your key fob, you can do so by simply reading the user manual. 

Of course, you might have already thrown away the manual by now. In that case, contact the manufacturers to help you out in finding the right size. 

In the general case, there are two different battery sizes that are used in the key fob for Nissan cars. These include one of the two pointed out below:

  • CR2025
  • CR2023


Key Fobs are clearly more preferred than standard keys among Nissan Car Owners. That is why you should never neglect using the right type of batteries for the keys. 

Although fixing it up is easy and requires no mechanical or automobile skill, you should always refrain from using the wrong type of battery on the key fob. 

This is because even if the key does work, it will still be ruined in the long run when the wrong battery type has been used for a period. 

Additionally, always make sure that the contact points are clean since they are the easiest to neglect.

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