The battery in a Mazda Miata is designed to power the vehicle's electrical accessories when the engine is not running. This battery is recharged by the vehicle's alternator while the engine is running. Mazda Miata batteries have a service life of approximately 45-60 months. After this time, their performance and reliability diminishes greatly. A failing Miata battery will not hold a charge from the alternator, resulting in a dead battery and an inability to start the vehicle. Replacement batteries are available from auto parts stores and Mazda dealerships.
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Things you need
- Battery terminal wrench
- 3/8-inch ratchet
- 3/8-inch metric socket set
Place the Miata's gear selector in park (automatic transmission) or first gear (manual transmission). Engage the parking brake and open the bonnet.
Loosen the bolts on the positive (red) and negative (black) battery terminals with the battery terminal wrench. Remove each terminal from the battery using a twisting and pulling motion.
Remove the bolts from the battery hold-down using a 3/8-inch ratchet and a 10-mm metric socket. Lift the battery hold-down off of the battery.
Grip the battery with two hands and carefully lift it up and out of the vehicle.
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