The 2004 Honda Odyssey typically uses a 12-volt automotive battery. The most common replacement size for this year is Group Size 24F, though some trims or configurations may use Group 35. Always verify with the current battery label or the owner's manual.
How to confirm the right battery size
To make sure you buy the correct battery for replacement, verify using these steps:
- Check the label on your current battery for the Group Size (for example, “Group Size 24F”).
- Consult the owner's manual or Honda’s official specifications for your exact trim and engine.
- Use your vehicle identification number (VIN) to look up the exact battery in a parts catalog or on Honda’s site.
- If you’re shopping in person, bring your old battery to the store so staff can match terminals and size.
Following these steps helps ensure you select the proper physical fit, terminal layout, and electrical rating for your climate and driving needs.
Common sizes and what to watch for
The 2004 Odyssey can use a couple of different group sizes depending on the engine and equipment. The two most common are Group Size 24F and Group Size 35, with CCA and RC targets that should meet or exceed the original specifications. Some models in fleet or higher-load configurations might use other sizes such as 51R, though that is less typical for this year.
- Group Size 24F: widely used on many 2004 Odysseys; typical CCA ranges around 550–750 depending on climate and exact model.
- Group Size 35: used in some configurations or when a higher capacity battery is needed; CCA generally in a similar range, with RC important for long starts.
- Group Size 51R: occasionally seen on certain vehicles, but not common for most 2004 Odysseys.
When shopping, prioritize a battery with equal or higher CCA and Reserve Capacity than the original. Make sure the terminal arrangement matches and the dimensions fit the engine bay space and hold-down clamp.
Summary
For a 2004 Honda Odyssey, the industry-standard replacement size is typically Group Size 24F, though some models may use 35 depending on options. Always verify with your current battery label, the owner's manual, or a VIN-based parts lookup. Prioritize matching or exceeding the original CCA and RC, and ensure the terminal layout and physical fit are correct to maintain reliable starts in all climates.