Honda Pilot 12V Battery Size and Replacement
Which battery fits a 2009 Honda Pilot?
The 2009 Honda Pilot is commonly listed as using a Group 24F 12V battery. This applies to the North American second-generation Pilot with the 3.5-litre V6, across its trims and in both two-wheel-drive and four-wheel-drive versions. This guide is not drawn from a verified Honda specification document. Before buying, confirm the size against the label on your current battery, your owner's manual, or a parts lookup that uses your VIN.
What the group size and the "F" mean
A battery group size is an industry code that sets a battery's outer case dimensions and where its terminals sit. A battery of the right group size fits the tray and hold-down clamp, and lets the cables reach the posts without stretching.
The "F" in 24F means the terminals are reversed compared with a standard Group 24 battery. The two sizes share the same case footprint. However, a plain Group 24 puts the positive and negative posts on opposite sides, so the Pilot's cables may not reach, or could be forced onto the wrong posts. Treat 24 and 24F as different parts.
When the answer could be different
Vehicles sold outside North America may have been built to a different specification, so check the local documentation. A previous owner may have fitted a non-standard battery, so the one in the vehicle is not always proof of the correct size. Some battery makers sell their own models under cross-referenced labels, so confirm that the physical size and terminal layout still match Group 24F.
Choosing a replacement
Check three things beyond group size:
Cold cranking amps (CCA): the current the battery can deliver to start an engine in cold conditions. Choose a battery whose CCA meets or exceeds the figure printed on your current battery or listed in your owner's manual. Reserve capacity: how long the battery can keep essential systems running if the charging system fails. Compare this figure between batteries of the same group size. Battery type: conventional flooded and AGM (absorbent glass mat) batteries are both sold in this size. AGM batteries are sealed and generally better at handling deep discharges, but they usually cost more. Both types can work, provided the size, terminal layout and ratings match.
Information not covered here
This guide does not give the original factory CCA or reserve capacity ratings for the 2009 Pilot, exact case dimensions, prices, warranty terms, or step-by-step removal instructions. Your owner's manual, the label on your current battery, or a parts retailer's VIN-based lookup are the most reliable sources for those details.