How to Open Your 2005 Mercury Grand Marquis Key Fob and Change Battery

How to Open Your 2005 Mercury Grand Marquis Key Fob and Change Battery

Remote key fob grant easy access to your auto. When the keyless entry remote battery is discharged you will not to be able unlock doors remotely. In this post, you will benefit from knowing how to open Mercury key fob and replace a dead battery DIY. If you decide to do it at home near Grand Marquis, follow our guide, but don't forget to check everything you need.

What type battery does 2005 Mercury Grand Marquis remote key fob required

Before starting disassembly remote key fob check all that you need: flat head screwdriver and CR2032 battery.
  • 1xCR2032 battery
  • flat head screwdriver

Step by step guide

A coin battery installed inside the your key fob. Gently try to pry apart your key with flat head screwdriver. Change 1xCR2032 battery with flat head screwdriver.

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

When the new battery installed, check key fob functionality by pressing buttons. If all functions works, assemble your fob’s body in reverse order.

At this point squeeze fob’s back cover together. Line your shell pieces together and put it together by hands from top to bottom. If your keyless entry remote shell tightly closed, we done. If not, repeat the last step.

Video of key fob opening

DIY: Ford Keyless Remote Battery Replacement & Disassembly

Still not working? Buy new one

Frequently Asked Questions

Keyless entry remote of Mercury Grand Marquis use 1xCR2032 batteries. Most CR2032 batteries are under $5 build upon the size packaging, type and brand you buy. You can take old battery to the store, to find a proper replacement.

Usually, after keyless entry remote battery change, reprogramming not required. Don't be scare of this procedure, because often it's described in user's manual.

Changing your remote key fob battery is easy to do in 2005 Mercury Grand Marquis. Most of car manufacturers think about customers and make a special hole for key fob disassembly.

The cost to change the battery inside keyless entry remote can run anywhere $50-600 depending on the brand and the service station.

You should replace batteries inside keyless entry remote of Mercury Grand Marquis at least once in four years. The term of battery vary on usage time, operating conditions and quality. Lithium cells normally will last longer.

These signs will alert you that it's perhaps time to replace battery in your 2005 Mercury Grand Marquis: low key battery indicator on dashboard, key fob buttons not working, multiple clicks to unlock or lock doors required and you didn't change battery more than 4 years.
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Fob Compatibility:

  1. FCC ID: CWTWB1U343 | CWTWB1U313 | CWTW
  2. Models: 1995-2006 Mercury Grand Marquis