Replace Key Fob Batteries

2003 Toyota Sienna Key Fob Battery Replacement Guide

2003 Toyota Sienna Key Fob Battery Replacement Guide

If your Toyota remote key fob isn't open doors perfectly, the cell battery most likely must to be replaced. Below, you will benefit from knowing how to open your key fob and replace a dead battery DIY. If you decide to do it at home near Sienna, use this guide, but don't forget to check everything you need before you start.

What size battery does 2003 Toyota Sienna keyless entry remote required

Replacing battery in key fob require flat head screwdriver, CR2025 battery and phillips 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
  • phillips head screwdriver

Step by step instruction

A small coin cell battery installed in the your keyless entry remote. Unscrew the back of the keyless entry remote. Spin the key fob over and look for at least one screw holding in the plastic.

Gently try to pry apart your key with pry tools. Change 1 CR2025 battery with flat head screwdriver.

Replace old battery with new one CR2025. Every battery has a negative and positive side and if you put the wrong connector down, the charge cannot go into your circuit board and make it work. Check position on battery, by "+" mark.

Before assembling keyless entry fob's case, check that all functions works by testing buttons on keyless entry remote.

The last thing to do is put your cover back on fob. Carefully try to assemble the two halves together by hands from top to bottom. Check your remote key fob shell for gaps. If it is not firmly closed try to repeat last step. Screw fastener in the back of the remote key fob.

Video of remote key fob opening

▶️How To Change Toyota SIENNA Remote Battery Replacement ( NO TOOLS NEEDED)

Still not working? Buy new one

Frequently Asked Questions

Keyless entry remote of Toyota Sienna use 1xCR2025 batteries. Most CR2025 batteries are under $4 depending on the size packaging, brand and type you buy. You can take old battery to the store, to be sure.

Remote key fob in most of cases do not require to be reprogrammed after battery replace. If your keyless entry remote not working, recheck new battery voltage. Otherwise, read user's manual or contact local dealer.

Yes, you can change battery in your 2003 Toyota Sienna remote key fob yourself. Most hard part is to disassembly keyless entry fob's case. It's pretty simple with our step by step guide.

Auto repair shop's cost for replace the battery in remote key fob is from $30 to as high as $500 depending on the make.

Key fob batteries in Toyota Sienna should be changed once in three years, but this will differ based on their amount of use and battery quality. If your key fob shortened signal strength, you should change batteries before it stop working and make problems for you.

These symptoms will alert you that it's perhaps time to replace battery in your 2003 Toyota Sienna: multiple clicks to unlock or lock doors required, low key battery indicator on dashboard, signal strength reduced and key fob buttons not working.
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Contents:

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

Other Toyota Models:

Fob Compatibility:

  1. FCC ID: BAB237131-056
  2. Models: 2001-2003 Toyota Sienna