Group 51 battery: equivalents & cars that use it

A BCI Group 51 battery measures 238×129×223 mm (L×W×H). The closest equivalents that fit the same tray are Group 51R - always confirm terminal side and CCA before swapping.

Cross-checked dataEvery spec is checked against manufacturer, retailer, and the BCI group-size standard, then dated.

Compiled and reviewed by the GarageDex editorial team - see how we verify →

What to look for in a Group 51 battery

Case size (L×W×H)	238×129×223 mm
Typical CCA	410-500 CCA (aim for 410+)
Chemistry	Standard flooded
Vehicles using it	13 across 1 make (2000-2006)

Computed across the 13 Group 51 vehicle-years in our verified dataset - a large sample of popular US models, not the entire fleet.

Buying a Group 51 battery

Match the group size (Group 51) and aim for at least 410 CCA - more in cold climates. Confirm your own car's rating on its page below; some trims require AGM. A battery is heavy to ship, so buying in person can win once you count free install and the core-charge refund - but to compare prices and reviews:

Best exact-fit replacementGroup 51, 410+ CCAShop Group 51 Best for cold climatesGroup 51, at or above 500 CCAShop Group 51 Best AGM upgrade (longer life)AGM Group 51 for heat and heavy loadsShop Group 51

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Group 51 equivalent sizes

These BCI groups share a near-identical case, so they may fit the same battery tray. “Same terminals” means the +/- posts sit on the same side; reversed terminals (R groups) can leave your cables short.

Group	Case (mm)	Terminals
Group 51R	238×129×223	reversed

Comparing two specific sizes? Use the battery cross-reference tool →

Cars that use a Group 51 battery

These vehicles are fitted with a Group 51 from the factory:

2005 Honda Civic410-500 CCA 2004 Honda Civic410-500 CCA 2003 Honda Civic410-500 CCA 2002 Honda Civic410-500 CCA 2001 Honda Civic410-500 CCA 2000 Honda Civic410-500 CCA 2006 Honda CR-V410-500 CCA 2005 Honda CR-V410-500 CCA 2004 Honda CR-V410-500 CCA 2003 Honda CR-V410-500 CCA 2002 Honda CR-V410-500 CCA 2001 Honda CR-V410-500 CCA 2000 Honda CR-V410-500 CCA

Frequently asked

How many CCA does a Group 51 battery need?

Group 51 vehicles in our data ship with 410-500 CCA (typically around 410). Match your car's original rating or go higher - aim for the top of that range in cold climates.

Is a Group 51 battery AGM or flooded?

Group 51 is used with standard flooded batteries. AGM is an optional upgrade for longer life in heat and heavy electrical loads, and is safe to fit.

What size is a Group 51 battery?

A BCI Group 51 case measures 238×129×223 mm (L×W×H). Any Group 51 battery uses that footprint, so it drops into the same tray.

What is equivalent to a Group 51 battery?

The closest BCI sizes that fit the same tray are Group 51R. Always confirm the terminal side and CCA before swapping - a reversed-terminal group can leave your cables short.