Replace Key Fob Batteries

How to Replace the Battery in a 2002 Mercury Mountaineer Key Fob

How to Replace the Battery in a 2002 Mercury Mountaineer Key Fob

If your auto key fob is not unlock doors perfectly, the battery likely must to be replaced. In this article, we explained how to open your car keyless entry remote and replace your Mercury key battery.

What size battery does 2002 Mercury Mountaineer keyless entry remote take

Don't forget before disassembly keyless entry remote be sure that you have all recommended tools and materials: flat head screwdriver and 1xCR2032 battery.
  • 1xCR2032 battery
  • flat head screwdriver

Step by step instruction

Inside of your key fob installed small button cell battery. Carefully try to pry apart your key with hands or flat head screwdriver. Change CR2032 battery with flat head screwdriver.

Replace old battery with new one CR2032. Be sure to connect the battery the right way around in a circuit. Your key will not work if you put battery wrong way.

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

The last thing to do is put your cover back on fob. Gently try to assemble the pieces in place by hands from top to bottom. If your fob shell firmly closed, we done. If not, repeat the last step.

How to replace the battery video instruction

How To Replace Mercury Mountaineer Key Fob Battery 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007

Still not working? Buy new one

Frequently Asked Questions

Keyless entry remote of Mercury Mountaineer require 1xCR2032 batteries. Price for CR2032 batteries are under $6 build upon the size packaging, brand and type you buy. You can take old battery to the store, to be sure.

Key fob in most of cases reprogramming not required after battery change. If your keyless entry remote not working, recheck new battery voltage. Otherwise, read user's manual or contact local dealer.

Yes, you can replace battery in your 2002 Mercury Mountaineer keyless entry remote yourself. Most hard part is to open keyless entry fob's case. It's pretty simple with our instruction.

The price to change the battery in remote key fob is from $30 to as high as $500 depending on the car and the service pricing.

Keyless entry remote batteries in Mercury Mountaineer should be replaced every three years, although this will differ based on frequency of use and quality. If your key fob shortened signal strength, you should replace batteries before it stop close doors and make trouble for you.

If your Mercury has low key battery indicator on dashboard, key fob buttons not working, signal strength reduced or need multiple clicks to unlock or lock doors, in most cases battery change inside remote key fob needed. Installed battery is discharged with a high probability, but if it's not fix, key change or repair required.
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Contents:

  1. Battery Size and Tools
  2. Replacement Guide
  3. Video Instruction
  4. FAQ

Other Mercury Models:

Fob Compatibility:

  1. FCC ID: CWTWB1U322
  2. Models: 2002-2010 Mercury Mountaineer