Why doesn’t my WRX STI battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you’ve been leaving the doors slightly open and the cabin light at night. Stop by for a complimentary battery check at your nearest Firestone Complete Auto Care and learn more about your battery's charge.

What happens to 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?

Get affordable prices on Subaru WRX STI batteries by using one of our limited-time battery deals. Plus, all DieHard car batteries come with a free replacement warranty and extra coverage with DieHard Assurance.

How long can I expect my car battery to last?

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.

Who sells WRX STI batteries near me?

You can shop for WRX STI 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.

2019 Subaru WRX STI Car Batteries

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Get a New Subaru WRX STI Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 2019 Subaru WRX STI at Firestone Complete Auto Care.

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The Right Battery Size for a 2019 Subaru WRX STI

Not sure what battery to get 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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Buy the Right Battery for Your Subaru WRX STI

You can pretty much drive your Subaru WRX STI until you don't want to anymore. But your WRX STI's battery? Don't count on it to last forever. The average car battery lasts 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. Look out for symptoms of a faulty car battery. A sluggish engine start, an illuminated check engine light or battery signal, swollen battery case, corrosion-covered posts, and subpar electrical performance can all signal that your battery is on its last leg.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With computerized testing we can see how much charge is left in your battery. Stop by for a free battery test and, if necessary, a battery replacement to help keep your 2019 Subaru WRX STI running! Automotive batteries are just one of our many areas of expertise. Our technicians are well-acquainted with Subaru’s service specs for WRX STI car batteries’ reserve capacities and cold cranking amps. Get help figuring out the battery size that fits your car perfectly, and schedule a weekday or weekend battery replacement service for your car.

Is There a DieHard Battery for WRX STIs?

We only want what’s best for your Subaru WRX STI, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard batteries shatter expectations using state-of-the-art advancements to satisfy the increasing power needs of new vehicles and their accessories. A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy 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 2019 Subaru WRX STI? Good thinking! Now, help it last longer and stay charged by caring for it from the get-go. You can take care of your battery by limiting short trips, cleaning your battery posts, and not using electronics such as the radio and power outlets when the engine is off.