Strange as it might sound, Mazda does not have a designated battery manufacturer—which means that they don’t recommend any particular battery or publish information on which companies they use.
This being the case, you’re not going to be able to get an exact 2014 Mazda 3 OEM battery.
Don’t worry, though—you can use just about any aftermarket battery that meets the same specifications. You’ll need a 12-volt/60-amp hour battery with a 20-hour discharge rate. You can also get away with using a 65-amp hour battery without any trouble.
As for the size group of the battery, you could need either a 26R-3, 35-2, 35-AGM, 35-1, 35-2, or 35-AGM. It depends on the trim level that you have.
To narrow your group size down, you can refer to your owner’s manual or simply measure the dimensions of your old battery. That will tell you the group size you’ll need.
Whichever version of the Mazda 3 you have, you should expect to pay around $260 for a quality battery replacement.
If that’s going to put a strain on your budget, you can always use Jerry
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