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Decent.
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Prices may varyThis product ranks #17 of 19 in Automotive Battery.Three above it ↓
Last reviewed July 13, 2026
TL;DR Flooded lead-acid, Group 51R, 500 SAE CCA published cleanly. Community service-life evidence is thin, but fitment is broad across 250+ applications, including the current Honda Civic.
Flooded lead-acid on a Group 51R footprint, manufactured by Clarios. SAE CCA is 500, above the roughly 400A OEM minimum for the Civic's Group 51R slot. Reserve capacity is 85 minutes. Warranty is 24 months full replacement, extending to a 5-year performance warranty. Flooded chemistry matches the Civic's conventional, non-start-stop electrical system. Community evidence is thin: one long-term report describes roughly 4 years on a related model in a hot and cold climate. The manufacturer lists 250+ applications.
Right pick for a Group 51R replacement, including the current Civic, where flooded chemistry matches the OEM system and broad fitment matters. Skip if your vehicle OEM-specifies AGM or start-stop chemistry, or a longer warranty is the priority.
Sealed flooded construction, no user-accessible vent caps, no chemical exposure pathway in normal installation. Spent lead-acid batteries are recovered through the retail core-charge return system, about 99 percent recycled at certified smelters.
The MT-51R is a BCI Group 51R battery with a top-post terminal layout. The manufacturer lists over 250 year, make, and model applications for this group size. Confirmed applications in the CCT vehicle-fitment index include the current-generation Honda Civic, plus older Civic generations, Honda Element, HR-V, Insight, Clarity, CR-V, Acura Integra and RSX, Nissan GT-R and Versa, and the Toyota MR2 Spyder. Always confirm your specific year and trim against the manufacturer's fitment guide before purchase.
500 CCA is published as the primary cold-cranking spec on both the manufacturer's product page and the Amazon listing, a genuine SAE J537 figure rather than a Power Cranking Amps or other marketing substitute.
The product label shows a sealed top with no user-accessible screw caps, and the manufacturer does not publish any water top-off instructions, consistent with a maintenance-free flooded design.
Community service-life evidence for this specific model is thin. One long-term report describes roughly 4 years of service on a related Interstate flooded model in a hot and cold climate, consistent with the typical 3 to 4 year service life for flooded lead-acid chemistry.
The MT-51R is conventional flooded lead-acid. Interstate also sells an AGM (absorbed glass mat) line for vehicles with start-stop systems or higher accessory loads; the current Honda Civic's OEM electrical system does not require AGM, so flooded chemistry is a correct match rather than a downgrade.
Marketing copy from Interstate Batteries, via Amazon. Not editorial.
Per manufacturer cross-reference. Verify on Amazon before purchase.
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