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2008-2014 Subaru WRX STI battery group size

The exact BCI group size your WRX STI takes — the code that decides which battery physically fits and reaches the cables. Cross-checked against the automaker's own chart and a retailer finder so you buy the right one the first time.

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Battery group size

35Flooded lead-acid2 sources

Verified · cross-checked against 2 independent sources · Jun 2026

OE minimum CCA

≥ 390

Choose at least this — never a verified figure

A battery is bought by its group size. Shop Group 35 batteries that physically fit — double-check the group printed on the battery against your car before you buy.

Find a Group 35 battery on Amazon
Where this came from
  • Interstate Batteries 2023 Application Guide (BCI/Clarios feed — retailer finder, one witness) — source“Subaru • WRX STI 2014-13 H4/2.5L 55D23L 390”
  • Genuine Subaru battery part (subarupartsdeal.com) — source“Part 82110AA010, manufacturer note "55D23L-MF": "Impreza STI | 2004-2012". 55D23L = BCI Group 35”

The group size carries our verified badge only when the automaker's own battery chart and an independent retailer finder agree on it — two genuinely separate sources, never two resellers of the same data. CCA is shown as an OE minimum, a “choose at least this” floor, never a verified number, because the right CCA is a property of the battery you pick. Your owner's manual is always the final word.