infiniti key fob battery replacement and size

Infiniti key fob battery replacement Intelligent Remote DIY Video

Last Updated on Friday May 18, 2018

In this guide, you will find instructions on how to change the key fob battery on your Infiniti keyless remote. You can watch the video on how to change the remote battery on your Infiniti key fob or follow the step by step instructions below. These instructions apply to multiple Infiniti vehicles even those equipped with the intelligent key. Owners of the Infiniti  FX35, M35, G35, G37 will find this key fob replacement guide helpful. 

Infiniti Key Battery Size

Infiniti Model Years: 2005 06 07 08 09 2010 11 12 13 14 15 16 2017

Instructions on how to change Infiniti key fob battery 

Step 1: Remove the metal key

Pull out the metal key. Press on the small release tab shown in the picture below. 

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The metal blade key can be used to manually open the driver?s door or the trunk in case of emergency. One example would be if your Infiniti car battery dies and you need to figure a way how to get inside. 

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Step 2: Separate the key housing

Look at the back side of the Infiniti key. Use a plastic wedge, the metal key blade or a small flat screwdriver to separate the key housing.

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Step 3: Remove the old battery and install new.

Remove the old battery and install the new CR2025 battery. Make note of the battery orientation. 

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Make sure the negative side of the battery is facing you. 


Dead Infiniti Key Fob Remote Battery Problems

I keep on accidentally pressing the panic or open trunk button. 

  • If you have owned an Infiniti with the key fob remote shown in this tutorial, you may find yourself accidentally pressing the buttons. If that is the case adding a Key Fob Shell Protector which will greatly reduce the chances of the buttons being pressed.

How do I start my Infiniti Car if the keyless remote/intelligent remote fob battery has died? 

You will need to insert the key fob in the slot designated for manual starting.

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You press the brake, press the start button. Nothing happens. Infiniti didn?t even crank. If your push button is not starting the car, follow these troubleshooting steps:

  • Check main battery. Find a replacement battery for Infiniti.
  • Check key fewer fob batteries are in good condition.
  • Faulty brake switch. If you are sure the car and keyfob batteries are in good condition, next you should check the brake switch.


If the car does not start the RKE transmitter (Key Fob) may have a low or dead battery. To start the  car try this.  

Put the nose side of the Key Fob against the ENGINE START/STOP button and push to operate the ignition switch.

Worn key fob remote? Consider adding a shell cover.

You may want to consider adding a cover to protect your remote. The covers can protect the buttons and the key fob remote itself. Our recommendation would be to use Silicone Key Fob Cover for Infiniti provides protection for the keyless remote. A cover will better protect the key from water and in case you accidently drop the key.

Applicable Part Numbers for Replacement Keyless Entry Ignition Key Fob Smart Proximity Remote

FCCID Numbers found on Infinti models with this key:

285E3JA05A; 285E3JA02A; KR55WK4B903; 315MHz
285E3-JA05A; 285E3-JA02A; KR55WK48903
KRSSWK48903 ; KRS5WK48903; KR5SWK48903


Posted by Andres on Jun 8, 2017 @ 00:41 am

Posted by Visitor on Jul 5, 2017 @ 19:03 pm