Honda Civic Battery Size (BCI Group and CCA)

Each row links to the full specification for that generation, including trim-by-trim breakdowns and the part numbers. Where engines within a generation differ, that page separates them.

The battery on a Honda Civic is set by its generation, not its model year, so each generation has one page carrying the complete figures, part numbers and fitment notes for every year it covers.

What size battery does a Honda Civic take?

BCI group 51R, rated at 410 cold cranking amps from the factory. Group size is a physical dimension and terminal-position standard, so a battery from a different group may not clamp down or may put the terminals on the wrong side.

How many CCA does a Honda Civic need?

At least 410 CCA. Going higher is harmless and helps in cold climates; going lower is how a vehicle that started fine in October stops starting in January.

Does the Honda Civic need an AGM battery?

The factory battery is a conventional flooded type. AGM is a valid upgrade, but never downgrade from AGM to flooded.

Where is the battery on a Honda Civic?

Engine bay, driver side.

Does a Honda Civic need the battery registered after replacement?

Gas models (2.0L, 1.5T, Si, Type R) continue with the Group 51R (~410 CCA factory; 425–500 CCA replacements common). 2025 Hybrid uses a different under-hood 12V battery. See the hybrid engine entry.