The Most Common Car Battery Group Sizes

Across 3,072 US vehicle configurations (250 models from 40 makes) in the GarageDex database, the single most common battery is BCI Group 48, fitted to about 30.4% of vehicles. Group 94R and Group 35 follow.

Methodology

Counts reflect distinct year/make/model configurations in the GarageDex database, each verified against a cited manufacturer or retailer fitment source. Share is the percentage of those configurations using a given BCI group as the primary fitment. Group sizes vary by trim and engine; see each vehicle page for specifics. How we verify.

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