Why won’t my WRX STI battery hold a charge?

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 dome lights on during the night. Stop in for a free battery check at your local Firestone Complete Auto Care to learn more about the state of your battery.

What do you do with my dead WRX STI battery?

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

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?

You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.

What is the white, crusty stuff around 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 clean a corroded WRX STI battery terminal?

You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your WRX STI 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 WRX STI?

Your local Firestone Complete Auto Care sells and installs WRX STI batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

2017 Subaru WRX STI Car Batteries

Get a New Subaru Battery

Get a New Subaru WRX STI Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 2017 Subaru WRX STI at Firestone Complete Auto Care.

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The Right Battery Size for a 2017 Subaru WRX STI

Researching battery replacements for your Subaru WRX STI? Use the following chart to find information on Subaru WRX STI battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
35-1	H4/2.5L	Replacement 24 months	Performance months	500
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: 35-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 500
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. Generally, car batteries last from three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Subaru WRX STI stranded. Watch for signs that your current battery is getting too old or too weak. A sluggish engine start, a blinking battery or check engine light, swollen battery case, corrosion-covered posts, or dim headlights may all indicate that your battery is on its last leg.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. Our equipment can see how much charge is left in your battery. Visit us for a complimentary battery check and, if needed, a replacement battery for your 2017 Subaru WRX STI. Car batteries are only one of our many strong suits. Our technicians are familiar with Subaru-specific recommendations for WRX STI battery CCAs and reserve capacity. Get help identifying the type and size of battery that's best for your WRX STI, and schedule an appointment today for a quick car battery replacement.

Why Choose a DieHard Battery for Your WRX STI?

We know what’s best for your Subaru WRX STI, which is why we exclusively carry the best. You need a reliable, durable and powerful battery in even the most extreme conditions. DieHard WRX STI batteries surpass expectations using state-of-the-art advancements to satisfy the growing power demands of new vehicles. They're no ordinary battery, they're extraordinary. Buy a DieHard battery for your Subaru WRX STI and get behind the wheel with confidence. Why? Because performance will be there when you need it most. That's the kind of battery we deliver.

Making Your WRX STI’s New Battery Last

Got a new car battery installed in your 2017 Subaru WRX STI? Great job! Now, help it last longer and stay charged by caring for it from the get-go. You can take care of your battery by cutting back on unnecessary short trips, keeping your battery posts clean, and not using electronics such as the radio and power outlets when the engine is off.

Commonly Asked WRX STI Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have a battery question that's unique to your Subaru WRX STI battery, stop by your nearest store. Our technicians have the answers.

Why won’t my WRX STI battery hold a charge? 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 dome lights on during the night. Stop in for a free battery check at your local Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my dead WRX STI battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
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? You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.
What is the white, crusty stuff around 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 clean a corroded WRX STI battery terminal? You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your WRX STI 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 WRX STI? Your local Firestone Complete Auto Care sells and installs WRX STI batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.