Battery size and architecture can differ between petrol, hybrid, start-stop and market variants. Start with the exact vehicle code.
Find the exact battery specification above first. If you are comparing a US replacement quote, our source-reviewed guide explains flooded versus AGM part costs, installation and diagnostic checks. It is not a price quote or a high-voltage hybrid battery guide.
US 12V battery replacement costs and battery-versus-alternator checks →
Own-model MX-5 Electrical System table, Lead-acid battery row: 46B24L (S) (12V-45Ah/20HR); the spec deck lists Battery 46B24L-S. Mazda notes the battery specification differs by country or region; check the battery installed.
