How to Open Your 2008 Mercury Marquis Key Fob and Change Battery

How to Open Your 2008 Mercury Marquis Key Fob and Change Battery

If your car keyless entry remote is not open doors correct, the cell battery likely needs to be changed. It's not complicated to replace the battery in your key fob with our instruction. Everything you need is outlined in this article.

What is the battery keyless entry remote use

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

Step by step guide

Inside of your remote key fob installed coin cell battery. Accurately try to pry apart your fob with hands or flat head screwdriver. Remove 1xCR2032 battery with flat head screwdriver.

Replace old battery with fresh one CR2032. 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.

When the new battery installed, verify key fob functionality by pressing buttons. If everything working fine, assemble your keyless entry fob's shell in reverse order.

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

Video of key disassembly

How To Replace Mercury Grand Marquis Key Fob Battery 2007 2008 2009 2010 2011

Still not working? Buy new one


Key fob of Mercury Marquis require 1xCR2032 batteries. Most CR2032 batteries are under $4 depending on the size packaging, type and brand you buy. Take your old battery to the store, with you to find a proper replacement.

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

Changing your remote key fob battery is simple to do in 2008 Mercury Marquis. Most of car manufacturers think of the customers and make a special hole for keyless entry remote open.

The price to replace the battery inside key fob can run anywhere from $30 to as high as $500 depending on the car and the service pricing.

Key fob batteries in modern cars should be changed every 3-4 years, but this will differ based on frequency of use and battery quality. If your key fob decreased signal strength, you should change batteries before it stop open doors and make trouble for you.

If your auto need multiple clicks to unlock or lock doors, has low key battery indicator on dashboard, fob's battery more than 4 years old or key fob buttons not working, it's probably battery replace in keyless entry remote required. Current battery is discharged with a high probability, but if it's not fix problem, key fob change or repair needed.
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Fob Compatibility:

  1. FCC ID: CWTWB1U322
  2. Models: 2007-2011 Mercury Marquis