How to Open Your 2003 Infiniti M45 Key Fob and Change Battery

How to Open Your 2003 Infiniti M45 Key Fob and Change Battery

If your M45 key fob is not unlock doors well, the cell battery more likely needs to be replaced. In this post, we outlined how to disassembly your remote key fob and change your Infiniti key battery step by step.

What type battery keyless entry remote use

Changing battery in keyless entry remote require flat head screwdriver and 1xCR2025 battery. Prepare these materials and tools before opening and make sure to match the type of your fob’s batteries.
  • flat head screwdriver
  • 1xCR2025 battery

Step by step guide

Inside of your remote key fob installed coin cell battery. Delicately try to open your keyless entry remote with pry tools. Remove 1 CR2025 battery with flat head screwdriver.

Change old battery with new one CR2025. Every battery has a negative and positive side and if you put the wrong connector down, the current cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.

Before assembling keyless entry fob's case, make sure that everything working fine by pressing buttons on keyless entry remote.

The last thing to do is put your cover back on fob. Gently try to put the two halves together by hands from top to bottom. Check your key fob body for gaps. If it is not tightly closed try to repeat last step.

How to replace the battery video guide

Infinity Q45 / M45 Key Fob Battery Replacement - EASY DIY

Still not working? Buy new one

Frequently Asked Questions

Keyless entry remote of Infiniti M45 require 1xCR2025 batteries. Price for CR2025 batteries are under $5 depending on the type, size packaging and brand you buy. Take your old battery to the store, to find a proper replacement.

Often, after key fob battery replace, you do not need to reprogram. Don't be scare of this procedure, because often it's described in user's manual.

Yes, you can change battery in your 2003 Infiniti M45 key fob yourself. Most difficult part is to open keyless entry fob's case. It's pretty easy with our instruction.

Car service cost for change the battery in key fob is $50-600 depending on the brand.

Remote key fob batteries in Infiniti M45 should be replaced every four years, although this will vary based on their amount of use and build quality. If your remote key fob decreased signal strength, you should change batteries before it stop open doors and make problems for you.

These signs will warn you that it's possible time to change battery in your Infiniti M45: key fob buttons not working, signal strength reduced, multiple clicks to unlock or lock doors required and low key battery indicator on dashboard.
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Fob Compatibility:

  2. Models: 2003-2004 Infiniti M45