Why won't my WRX STI battery stay charged?

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

What do you do with my old WRX STI battery?

We recycle it, taking care of both your car and the Earth.

How much will replacing my Subaru WRX STI’s battery cost if I get a DieHard battery?

You can find affordable WRX STI 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.

What is the average lifespan of a car battery?

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.

Why is there white, crusty buildup on my WRX STI’s battery post?

The white, crusty stuff that can accumulate around WRX STI car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.

How do I remove corrosion from my WRX STI car battery?

To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your WRX STI owner’s manual for instructions on how to do so.

Where can I purchase WRX STI batteries near me?

At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install WRX STI batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.

Car Batteries for 2020 Subaru WRX STI

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Get a New Subaru WRX STI Battery

Don't let a failing battery slow you down. Shop replacement batteries for 2020 Subaru WRX STIs today and schedule a quick installation at Firestone Complete Auto Care.

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2020 Subaru WRX STI Battery Replacement & Size

Researching battery replacements for your Subaru WRX STI? Use this chart to find the right battery size and CCAs for your Subaru WRX STI.

Battery	Engine	Warranty		Cold Cranking Amps
26R-3	H4/2.5L	Replacement 24 months	Performance months	575
35-2	H4/2.5L	Replacement 36 months	Performance months	640
35-AGM	H4/2.5L	Replacement 36 months	Performance months	650

BATTERIES
H4/2.5L - Battery: 26R-3 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 575
H4/2.5L - Battery: 35-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 640
H4/2.5L - Battery: 35-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 650

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Shopping for Subaru WRX STI Car Batteries

Sadly, your Subaru WRX STI won't last forever. Neither will its battery. The average car battery lasts three to five years. Don’t get stranded by your WRX STI’s car battery. Replace it regularly instead! Look out for symptoms of a faulty car battery. A slow engine crank, a blinking battery or check engine light, swollen battery case, corroded battery posts, or dim headlights can all be signs that your battery is waving goodbye.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. With computerized testing we can see how much charge is left in your battery. Visit us for a complimentary battery check and, if needed, get your Subaru WRX STI a replacement battery. Car batteries are one of our many specialties! Our expert technicians understand Subaru service recommendations for WRX STI battery CCAs and reserve capacity. Get help figuring out the battery size that fits your car perfectly, and schedule a fast car battery replacement at your earliest convenience.

Firestone Has DieHard Batteries for WRX STIs

We only want what’s best for your Subaru WRX STI, which is why we carry just that. You need a reliable, durable and powerful battery in extremely hot and cold environments. DieHard WRX STI batteries surpass expectations using the latest innovative technology to meet the growing power demands of new vehicles. They're no ordinary battery, they're extraordinary. Choose a DieHard battery for your Subaru WRX STI and have the peace of mind that performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

Making Your WRX STI’s New Battery Last

Got a new car battery installed in your 2020 Subaru WRX STI? Good thinking! Give your new car battery the best start with proper care. ensuring all the lights are turned off before you leave the car, limiting short trips, cleaning your battery posts, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your WRX STI Car Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have battery questions that are Subaru WRX STI-specific, pay us a visit. Our expert techs have the answers you need.

Why won't my WRX STI battery stay charged? A battery that won't hold a charge is almost as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop by for a free battery test at your nearest Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my old WRX STI battery? We recycle it, taking care of both your car and the Earth.
How much will replacing my Subaru WRX STI’s battery cost if I get a DieHard battery? You can find affordable WRX STI 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.
What is the average lifespan of a car battery? 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.
Why is there white, crusty buildup on my WRX STI’s battery post? The white, crusty stuff that can accumulate around WRX STI car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.
How do I remove corrosion from my WRX STI car battery? To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your WRX STI owner’s manual for instructions on how to do so.
Where can I purchase WRX STI batteries near me? At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install WRX STI batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.