How to Open Your 2008 Infiniti FX45 Key Fob & Change Battery

How to Open Your 2008 Infiniti FX45 Key Fob & Change Battery

If your FX45 key is no longer open doors properly, the cell battery surely needs to be replaced. Yes, it is possible to change the battery in your remote key fob by yourself. All you need is explained in this article.

What is the battery key fob use

Replacing battery in keyless entry remote require 1xCR1620 battery and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the size of your keyless entry fob's batteries.
  • 1xCR1620 battery
  • flat head screwdriver

Step by step guide

Inside of your keyless entry remote installed coin battery. Gently try to pry apart your fob with flat head screwdriver. Replace CR1620 battery with flat head screwdriver.

Now it's time to install new battery inside fob’s shell. Be sure to connect the battery the right way around in a circuit. Your key will not work if you connect battery wrong way.

After the new battery installed, verify key fob functionality by pressing buttons. If all functions works, assemble your fob’s shell in reverse order.

At this point squeeze keyless entry fob's back cover together. Line your body two halves together and assemble it in place by hands from top to bottom. If your key body firmly closed, we done. If not, repeat the last step.

Key Fob Battery Replacement 2008 Infiniti FX45 Video

How To Replace Infiniti FX45 Key Fob Battery 2003 2004 2005 2006 2007 2008

Still not working? Buy new one


Remote key fob of Infiniti FX45 require 1xCR1620 batteries. Price for CR1620 batteries are under $6 build upon the brand, size packaging and type you buy. You can take old battery to the store, to be sure.

Usually, after key battery change, reprogramming not required. Key fob reprogramming procedure often described in user's manual of your vehicle.

Replacing your keyless entry remote battery is easy to do in 2008 Infiniti FX45. Most of car manufacturers think of the clients and make a special hole for remote key fob disassembly.

Dealer service cost for replace the battery in remote key fob is $50-600 depending on the make.

Key fob batteries in modern cars should be changed every four years, but this will differ based on usage and quality. If your key fob shortened signal strength, you should change batteries before it stop open doors and make problems for you.

If your FX45 has low key battery indicator on dashboard, signal strength reduced, fob's battery more than 4 years old or key fob buttons not working, it's probably battery replace in remote key fob needed. Installed battery is dead or weak with a high probability, but if it's not help to fix issues, key replace or repair required.
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Other Infiniti Models:

Fob Compatibility:

  1. FCC ID: CWTWB1U751
  2. Models: 2003-2008 Infiniti FX45