2017–2025 Mazda CX-5 Battery Size (BCI Group and CCA)

Which Mazda CX-5 model years does this cover?

These battery specifications apply to every Mazda CX-5 built from 2017 through 2025 — the KF (2nd generation), compact suv. Nothing in this specification changes between those model years. Pick your year for the engines it offered, what changed that year, and the problems recorded against it.

What changed during the 2017–2025 Mazda CX-5

• 2017All-new KF generation on a stiffer platform; 2.0L dropped from the US lineup, 2.5L becomes the sole gas engine
• 2018Cylinder deactivation added to the 2.5L; g-Vectoring Control standard
• 20192.5L Turbo and 2.2L SkyActiv-D diesel both introduced (diesel on Signature trim only)
• 2020Diesel discontinued after this model year due to low take rate
• 2022Mid-cycle refresh: revised front/rear styling, wheel designs, and more standard driver-assist tech; mechanical specs carry over
• 2024Trim names simplified (2.5 S, 2.5 S Select, 2.5 S Preferred, 2.5 Turbo, etc.); final CX-5 model year before the 2026 all-new third generation

What size battery does a 2017–2025 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 2017–2025 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 2017–2025 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 2017–2025 Mazda CX-5?

Engine bay, driver side.

Does a 2017–2025 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.