Why won't my RX-7 battery stay charged?

A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop in for a free battery check at your nearest Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old RX-7 battery?

We recycle it! Nearly 100% of all lead-acid batteries are recyclable.

How much do DieHard batteries cost for your Mazda RX-7?

You can find affordable RX-7 batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.

How long is a car battery good for?

The typical 12-volt car battery may last three to five years, depending on the type of battery, the driving conditions, and how well the battery is maintained.

What is the white, crusty stuff around my RX-7’s battery post?

If you notice white, crusty stuff around the battery terminals of your RX-7, it's likely corrosion. A chemical reaction between battery acid and the air can create a white, powdery substance that builds up over time on the terminals. This buildup can interfere with the electrical connection between the battery and your RX-7’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean corrosion off my RX-7 vehicle battery?

You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your RX-7 owner's manual to learn how to disconnect the battery cables. After disconnecting the cables, use a mixture of water and baking soda, a wire brush, and a rag to carefully clean the terminals.

Where can I find a battery for my RX-7?

You can shop for RX-7 batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.

Car Batteries for 1990 Mazda RX-7

Get a New Mazda Battery

Get a New Mazda RX-7 Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 1990 Mazda RX-7 at Firestone Complete Auto Care.

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The Right Battery Size for a 1990 Mazda RX-7

Researching battery replacements for your Mazda RX-7? Check the chart to find the right car battery size and cold cranking amps for your RX-7.

Battery	Engine	Warranty		Cold Cranking Amps
26R-3	R2/1.3L	Replacement 24 months	Performance months	575
35-2	R2/1.3L	Replacement 36 months	Performance months	640
35-AGM	R2/1.3L	Replacement 36 months	Performance months	650

BATTERIES
R2/1.3L - Battery: 26R-3 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 575
R2/1.3L - Battery: 35-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 640
R2/1.3L - Battery: 35-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 650

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Buying a Replacement Battery for Mazda RX-7

You can pretty much drive your Mazda RX-7 until you don't want to anymore. But your RX-7's battery? Don't count on it to last forever. On average, auto batteries last anywhere from three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Mazda RX-7 stranded. Watch for signs that your current battery is getting too old or too weak. A slow engine crank, an illuminated check engine light or battery signal, swollen battery case, corrosion-covered posts, or faded headlights can all be signs that your battery is on its last leg.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. With best-in-class tools we can tell you how much "life" is left in your battery. Stop by for a free battery test and, if needed, a replacement battery for your 1990 Mazda RX-7. Car batteries are only one of our many strong suits. Our expert technicians understand Mazda service recommendations for RX-7 battery CCAs and reserve capacity. Get help identifying the type and size of battery that's best for your RX-7, and schedule a fast car battery replacement at your earliest convenience.

Why Choose a DieHard Battery for Your RX-7?

We know what’s best for your Mazda RX-7, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard batteries go above and beyond using the latest innovative technology to meet the expanding power demands of modern vehicles A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your Mazda RX-7 and have the peace of mind that performance will be there when you're counting on it. That’s why you should choose batteries from Firestone Complete Auto Care.

Making Your RX-7’s New Battery Last

Have you recently had a fresh battery installed in your Mazda RX-7? Good thinking! You can give your new battery a head start with proper care and attention. You can take care of your battery by decreasing the number of short trips you take, cleaning your battery posts, and avoiding radio and electronic component use when the engine is off.

Commonly Asked RX-7 Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have a battery question that's unique to your Mazda RX-7 battery, pay us a visit. Our technicians have the answers.

Why won't my RX-7 battery stay charged? A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop in for a free battery check at your nearest Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old RX-7 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much do DieHard batteries cost for your Mazda RX-7? You can find affordable RX-7 batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.
How long is a car battery good for? The typical 12-volt car battery may last three to five years, depending on the type of battery, the driving conditions, and how well the battery is maintained.
What is the white, crusty stuff around my RX-7’s battery post? If you notice white, crusty stuff around the battery terminals of your RX-7, it's likely corrosion. A chemical reaction between battery acid and the air can create a white, powdery substance that builds up over time on the terminals. This buildup can interfere with the electrical connection between the battery and your RX-7’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean corrosion off my RX-7 vehicle battery? You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your RX-7 owner's manual to learn how to disconnect the battery cables. After disconnecting the cables, use a mixture of water and baking soda, a wire brush, and a rag to carefully clean the terminals.
Where can I find a battery for my RX-7? You can shop for RX-7 batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.