2017–2020 Hyundai Elantra Battery Size (BCI Group and CCA)

Which Hyundai Elantra model years does this cover?

These battery specifications apply to every Hyundai Elantra built from 2017 through 2020 — the AD (6th 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.

What changed during the 2017–2020 Hyundai Elantra

• 2017AD generation launch; 2.0L MPI base engine, 1.4T Eco introduced
• 20181.6T Sport sedan added, replacing the previous-generation naturally aspirated Sport
• 2019Facelift: new front/rear fascias, standard LED DRLs, available LED headlights on upper trims
• 2020Final model year before the CN7 redesign; carryover engines

What size battery does a 2017–2020 Hyundai Elantra take?

BCI group 35 (H5/47 on some idle-stop-and-go-equipped trims), 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 2017–2020 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 2017–2020 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 2017–2020 Hyundai Elantra?

Engine bay, driver side.

Does a 2017–2020 Hyundai Elantra need the battery registered after replacement?

Base flooded Group 35 on most trims. AutoZone/Advance list Group 35 or 124R depending on year/engine. Verify by VIN. AGM is not required unless the car has Hyundai's idle Stop & Go feature.