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Decent.
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Prices may varyThis product ranks #19 of 19 in Automotive Battery.Three above it ↓
Last reviewed July 13, 2026
TL;DR Flooded lead-acid, Group 51R, 425 SAE CCA, Interstate's own value-tier line. No SKU-specific service-life evidence yet, but fitment is broad across 200+ applications, including the current Honda Civic.
Flooded lead-acid on a Group 51R footprint, positioned by Interstate as its value option below the MT series. SAE CCA is 425, meeting but not substantially exceeding the roughly 400A OEM minimum for the Civic's Group 51R slot. Reserve capacity is 75 minutes. Warranty is 18 months, free replacement, no stated prorated extension. Flooded chemistry matches the Civic's conventional, non-start-stop system. No community evidence specific to this model was found. The manufacturer lists 200+ applications.
Right pick for a Group 51R replacement, including the current Civic, where price is the priority and OEM CCA is enough. Skip if you want the extra headroom and longer warranty of the sibling MT-51R, or your vehicle OEM-specifies AGM.
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 M-51R is a BCI Group 51R battery. The manufacturer lists over 200 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.
The M-51R is Interstate's value-tier line for this group size: 425 SAE CCA versus the MT-51R's 500 CCA, a 75-minute reserve capacity versus 85 minutes, and an 18-month free-replacement warranty versus 24 months. Both are Group 51R conventional flooded batteries with the same case dimensions.
425 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.
No service-life evidence specific to this value-tier model was found in this research pass. As a conventional flooded battery, the typical chemistry-wide service life is 3 to 4 years.
Marketing copy from Interstate Batteries, via Amazon. Not editorial.
Per manufacturer cross-reference. Verify on Amazon before purchase.
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