Group 51 battery

Battery group size

BCI Group 51

About 238 × 129 × 223 mm (9.37 × 5.08 × 8.78 in, L × W × H).

Fits 3 verified year/engine rows 410–500 CCA min in our data

Drawn from the dimensions above: length and height to scale, width shown in perspective. Terminal posts shown for orientation only: terminal side not verified yet, so match the + and − positions on your old battery.

Dimensions as published in Toyota's TrueStart battery guide (source, checked 2026-10-19). Brands vary by a few millimeters.

Vehicles that use a Group 51

Vehicle	Years	Engine / version	Min. CCA	Type
Honda Accord	2014–2015	2.0L Hybrid	500	–
Honda Accord	2017–2020	2.0L Hybrid	500	–
Honda Civic	2001–2005	1.7L 4-cyl	410	–

– = not specified in our sources (hover for details). Sorted by make, model, then year. Only verified rows are listed. Download everything as CSV.

Confirm in your owner's manual. Battery fitment can change with engine, trim, option packages, market (US vs. Canada) and mid-year production changes. Before you buy, check the label on the battery that's in your car now and your owner's manual.

Tips for choosing a Group 51

Group size sets the case size and terminal layout (our diagram doesn't show the terminal side yet). It doesn't set power, so check CCA too.
Equal or higher CCA than the minimum is fine. Lower can mean hard starts in cold weather.
If your car came with an AGM or EFB battery (often cars with engine start-stop), stay with that type.

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