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How to Change the Car Battery on a 2003 Honda Odyssey

This post is sponsored by The Home Depot.
Husky - 125-Piece Mechanics Tool Set

Good morning friends!

This is not one of my usual DIY or decor posts, but it's something that affected me a few weeks ago.

I was running some errands when I noticed the lights on the dashboard were running very dim. Well, nothing I could do right there. I also forgot to tell my husband when I got home to check out that issue. It was only until the next morning when I was about to go out again and my car didn't turn on, that I remembered something wasn't working properly. Yep. The battery.

Now, if you paid attention to the year on the title of this post, my car is a very old car. A minivan, the one I used to bring my kids to school and trips when they were little. I loved it then and I love it now. It's been so reliable! Nowadays I use it a lot to carry lumber, I can fit a full sheet of plywood nicely in there... and furniture pieces, and trash to the recycling center... And I don't have to worry about damaging it anymore.

My husband has been pushing me about getting a new car to replace my minivan, but I don't want to. I keep on telling him I'll be driving this one until either of us dies! :D

Instead of a new car, I only needed a battery to put my trusty minivan back on the road again. And this time I made sure to learn how to replace a car battery. It's so simple, I want to show you how you can do it too!

You can watch the video that I recorded while the hubs did the job. ;) Or you can continue reading below.

*This post contains affiliate links for your convenience. Click here to read my full disclosure policy.

The tools you'll need:

Besides the new battery, the tool you'll need the most for this job is a wrench or a ratchet & socket set. Well, this is one of those instances where you're going to be happy to own an awesome mechanic's toolset. It sure makes this job so easy!
The other tools we used: Work gloves, cleaning rags, and a small wire brush.


1. Ensure your vehicle is in park mode and the engine is off. Open the car hood.

2. Locate the battery and loosen the nut on the black/negative (-) end of the battery.
    Detach the black/negative cable from the battery.
loosening the negative cable

3. Loosen the nut on the red/positive (+) end of the battery and detach the cable from the battery.
Loosening red/positive cable

Note: Never let any metal object touch both, the negative and positive posts on the battery at the same time. It can create a current that can spark.

4. Using a wrench or socket and ratchet remove the battery hold-down clamp.

5. Take the battery out of the battery compartment. Remember, it's heavy.

6. Clean the battery cable connectors with a wire brush.

7. Insert the new battery.

8. Secure the battery with the hold-down clamp.

9. Rub both terminals with an anti-corrosion solution.

10. Attach and tighten the red/positive (+) cable.

11. Attach and tighten the black/negative (-) cable
Husky 125-piece Mechanics tool set

12. Make sure all cable connections and hold-downs are properly tightened. Try to move the battery... If it shifts at all, your car may not turn on due to a weak electrical connection.
Honda Odyssey 2003

13. Bring the old battery to the proper recycling location in your area.

Husky - 125-Piece Mechanics Tool Set

Get this
Husky 125-Piece Mechanics tool set
  • Set includes 1/4 in. and 3/8 in. drive 144-position long-handled ratchets, 22-1/4 in. drive standard sockets, 26-3/8 in. drive standard sockets, 21-1/4 in. drive deep sockets, 22-3/8 in. dive deep sockets, 24-bit sockets, and 8 extensions and drive adapters
  • 144-position, low-profile, long handle ratchet has an industry-leading 2.5° arc swing, turning a fastener in less than 1 in. of space
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  • Includes SAE and metric sockets
  • Includes 24-bit sockets covering SAE hex, metric hex, and Torx
  • Tools are forged from chrome alloy steel for outstanding durability and strength
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  • Plastic storage case is stamped with size markings for easy identification and organization
  • Backed by a Lifetime Warranty. If your Husky product ever fails, bring it back and we will replace it for free. Click here for details.
Husky 125-piece Mechanics tool set

Honda Odyssey 2003

I acknowledge that The Home Depot is partnering with me to participate in the promotional program described above (the “Program”). As a part of the Program, I am receiving compensation in the form of products and services, for the purpose of promoting The Home Depot. All expressed opinions and experiences are my own words. My post complies with the Word Of Mouth Marketing Association (WOMMA) Ethics Code and applicable Federal Trade Commission guidelines.

*This post contains affiliate links.


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