How to Open Your 2002 Mazda Protege5 Key Fob & Change Battery

How to Open Your 2002 Mazda Protege5 Key Fob & Change Battery

Keyless entry remote allow access to your Mazda. If the remote key fob battery is weak you’ll not to be able lock car from distance. It's not difficult to replace the battery in your keyless entry remote, and it’s easier than you think. Everything you need is outlined in this post.

What type battery key fob require

Before starting disassembly remote key fob make sure that you have all required tools and materials: CR2025 battery and flat head screwdriver.
  • flat head screwdriver
  • 1xCR2025 battery

Step by step guide

Inside of your key fob installed coin battery. Accurately try to pry apart your key fob with hands or flat head screwdriver. Remove CR2025 battery with flat head screwdriver.

Now it's time to install new battery in keyless entry fob's shell. 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.

After the new battery installed, check key fob by pressing buttons. If all functions works, assemble your keyless entry fob's shell in reverse order.

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

How to change the battery video guide

How To Replace Mazda Protégé 5 Key Fob Battery 2002 2003

Still not working? Buy new one


Remote key fob of Mazda Protege5 use 1xCR2025 batteries. Price for CR2025 batteries are under $4 depending on the type, brand and size packaging you buy. You can take old battery to the store, to be sure.

Often, after remote key fob battery change, 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 2002 Mazda Protege5 keyless entry remote yourself. Most difficult part is to open fob’s case. It's pretty simple with our guide.

Car service cost for change the battery in key is from $30 to as high as $500 depending on the brand.

You should replace batteries inside key fob of Mazda Protege5 at least every three years. The lifetime of battery differ on frequency of use, operating conditions and quality. Lithium cells normally will last longer.

If your Protege5 signal strength reduced, fob's battery more than 4 years old, has low key battery indicator on dashboard or key fob buttons not working, it's probably battery change inside key fob required. Installed battery is dead with a high probability, but if it's not help, keyless entry remote change or repair required.
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Fob Compatibility:

  1. FCC ID: KPU41704
  2. Models: 2002-2003 Mazda Protege5