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2021–2025 CN7 (7th generation)

2021–2025 Hyundai Elantra Battery Size (BCI Group and CCA)

The 2021–2025 Hyundai Elantra uses a BCI group 35 (gas trims); H5 AGM on trims with idle Stop & Go battery rated at 500 cold cranking amps. Fitment, replacement notes, and what to check before you buy.

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The 2021–2025 Hyundai Elantra uses a Group 35 (gas trims); H5 AGM on trims with idle Stop & Go battery with 500 CCA.

2021–2025 Hyundai Elantra battery specifications

Check your manual
SpecValue
BCI group size35 (gas trims); H5 AGM on trims with idle Stop & Go
Cold cranking amps500 CCA
Battery typeFLOODED
AGM requiredNo
LocationEngine bay, driver side (gas); trunk (hybrid)

Base gas trims use a flooded Group 35 battery. Trims equipped with Hyundai's idle Stop & Go feature require an AGM (commonly a Group H5) to survive the frequent stop/restart cycling. Check your trim before replacing with flooded. Hybrid uses a separate trunk-mounted 12V AGM (see hybrid engine entry).

1.6L Hybrid (Smartstream + 6-speed DCT hybrid transaxle) battery

Check your manual
SpecValue
BCI group sizeHybrid 12V AGM auxiliary battery (not the high-voltage lithium-ion pack)
Battery typeAGM
LocationTrunk, behind side trim panel; jump posts under the hood

The high-voltage 1.32 kWh lithium-ion-polymer pack is separate, under the rear seat, and is not user-serviceable. The small 12V AGM battery is what dies and strands the car.

Which Hyundai Elantra model years does this cover?

These battery specifications apply to every Hyundai Elantra built from 2021 through 2025 — the CN7 (7th generation), compact sedan. 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.

2021 Elantra2022 Elantra2023 Elantra2024 Elantra2025 Elantra

What changed during the 2021–2025 Hyundai Elantra

  • 2021CN7 generation launch; 2.0L MPI, Hybrid, and 1.6T N Line all available at launch
  • 2022Elantra N added (2.0L turbo, 276 hp); manual or 8-speed wet DCT
  • 2023–2024Facelift with revised front fascia and updated infotainment; N gets minor suspension/software tweaks
  • 2025Carryover year; Elantra Hybrid continues into the following model year per Hyundai's 2026 lineup

2021–2025 Hyundai Elantra battery: common questions

What size battery does a 2021–2025 Hyundai Elantra take?

BCI group 35 (gas trims); H5 AGM on trims with idle Stop & Go, rated at 500 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 2021–2025 Hyundai Elantra need?

At least 500 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 2021–2025 Hyundai Elantra 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 2021–2025 Hyundai Elantra?

Engine bay, driver side (gas); trunk (hybrid).

Does a 2021–2025 Hyundai Elantra need the battery registered after replacement?

Base gas trims use a flooded Group 35 battery. Trims equipped with Hyundai's idle Stop & Go feature require an AGM (commonly a Group H5) to survive the frequent stop/restart cycling. Check your trim before replacing with flooded. Hybrid uses a separate trunk-mounted 12V AGM (see hybrid engine entry).

Sources

Other Hyundai Elantra generations

2017–2020 battery2012–2016 batteryCompare all generations

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