How to Replace the Battery in a Mazda6

The Mazda 6, a sporty mid-size car, is available as a sedan, four-door hatchback or station wagon. Changing out the battery is a relative easy job. It is conveniently located on the driver's side, near the engine wall. Most batteries should last about 5 years, but if you see a white, chalky substance on the battery, replace it with a new one.

Remove the bar that holds the battery in place.

Take off the cable ends from the battery terminals with a battery terminal puller. Remove the negative cable first.

Lift the battery out of the compartment. Safely dispose of used battery at an auto parts store, which will often take it as a trade-in, or bring it to a recycling center.

Use the wire brush to clean the tray that holds the battery. Wipe it off with a damp cloth and let it dry before replacing new battery.

Clean the insides of the connector cables with a pointed wire brush. Keep your gloves on at all times to avoid getting acid on your hands.

Place the new battery on the shelf. Put the correct cable on each terminal and tighten securely with pliers or socket wrench.


Check your Mazda6's warranty if it's less than five years old to find out if battery replacement is still covered. If you must buy a replacement, then consider a Mazda-dealer installed battery, since they have a 36/60-Month Replacement Warranty.


Never smoke when replacing a battery. Wear gloves when handling the battery and the battery cables. Cover your eyes with goggles to prevent acid splash.

Things You'll Need

  • New 12-volt battery
  • Battery terminal puller
  • Wire brushes
  • Socket wrench
  • Gloves
  • Old rags
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