Mazda CX-5 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 Mazda CX-5 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 Mazda CX-5 take?

BCI group 35, rated at 520 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 Mazda CX-5 need?

At least 520 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 Mazda CX-5 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 Mazda CX-5?

Engine bay, driver side.

Does a Mazda CX-5 need the battery registered after replacement?

Mazda's own spec (2019 US owner's manual) lists the gas-engine battery as 12V-60Ah/20HR or 65Ah/20HR, and the diesel as 65Ah or 80Ah/20HR, both correspond to a Group 35 case in the aftermarket. No AGM requirement; a higher-capacity Group 35 AGM is a common upgrade for cold climates.