Replace Key Fob Batteries

How to Replace the Battery in a 2004 Mazda 3 Key Fob

How to Replace the Battery in a 2004 Mazda 3 Key Fob

If your 3 remote key fob is not unlock doors correct, the cell battery probably must to be changed. Yes, it is possible to change the battery in your remote key fob, and it’s easier than you think. Everything you need is outlined in this post.

What type battery remote key fob require

Replacing battery in keyless entry remote require one CR2025 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.
  • 1xCR2025 battery
  • flat head screwdriver

Step by step guide

Inside of your keyless entry remote installed tiny coin battery. Carefully try to disassemble your keyless entry remote with flat head screwdriver. Remove 1 CR2025 battery with flat head screwdriver.

Change old battery with fresh one CR2025. 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 position on battery, by "+" mark.

When the new battery installed, verify remote key fob functionality 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 body two halves together and put it in place by hands from top to bottom. Inspect your keyless entry remote shell for gaps. If it is not tightly closed try to repeat last step.

Video of keyless entry remote opening

Mazda 3 Rectangular Key Fob Battery Replacement (2004 - 2008)

Still not working? Buy new one

Frequently Asked Questions

Key fob of Mazda 3 require 1xCR2025 batteries. Price for CR2025 batteries are under $4-6 build upon the size packaging, type and brand you buy. You can take old battery to the store, to be sure.

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

Yes, you can change battery in your 2004 Mazda 3 keyless entry remote yourself. Most hard part is to open keyless entry fob's case. It's pretty simple with our instruction.

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

You should replace batteries inside key fob of Mazda 3 at least once in 4 years. The term of battery differ on frequency of use, quality and operating conditions.

These signs will alert you that it's perhaps time to change battery in your 2004 Mazda 3: you didn't change battery more than 4 years, multiple clicks to unlock or lock doors required, signal strength reduced and key fob buttons not working.
Be the first to comment.
Your message is required.

Contents:

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

Other Mazda Models:

Fob Compatibility:

  1. FCC ID: KPU41846
  2. Models: 2004-2006 Mazda 3