Why won't my Legacy battery stay charged?

A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you’ve been leaving the doors slightly open and the dome lights on during the night. Stop by for a free battery test at your local Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old Legacy battery?

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

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

Get affordable prices on Subaru Legacy 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 often should I replace my 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.

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

A chemical reaction between battery acid and the air can cause a white, crusty buildup to form on the terminals of your Legacy car battery. This buildup — known as corrosion — can impede the flow of electricity and cause a range of issues, from poor performance to premature battery failure.

How do I remove corrosion from my Legacy car battery?

Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.

Where can I find a battery for my Legacy?

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

2021 Subaru Legacy Batteries

Get a New Subaru Battery

Get a Battery for Your Subaru Legacy

Don’t let a dead battery stop you. Shop replacement car batteries for your 2021 Subaru Legacy at Firestone Complete Auto Care.

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Battery Size & Replacement for 2021 Subaru Legacy

Need more info about Subaru Legacy batteries? Check the chart to find the right car battery size and cold cranking amps for your Legacy.

Battery	Engine	Warranty		Cold Cranking Amps
H5-AGM	H4/2.5L	Replacement 36 months	Performance months	680
H5-AGM	H4/2.4L	Replacement 36 months	Performance months	680

BATTERIES
H4/2.5L - Battery: H5-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 680
H4/2.4L - Battery: H5-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 680

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Buying a Replacement Battery for Subaru Legacy

Sadly, your Subaru Legacy won't last forever. Neither will its battery. Generally, car batteries last from three to five years. You want to replace your 2021 Subaru Legacy battery before it fails and leaves you stranded. Watch for signs that your current battery is getting too old or too weak. A lagging starter, an illuminated battery or check engine light, swollen battery case, corrosion-covered posts, or weak lights 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. With best-in-class tools we can tell you how much "life" is left in your battery. Visit us for a complimentary battery check and, if needed, a replacement battery for your 2021 Subaru Legacy. Car batteries are only one of our many strong suits. Our expert technicians understand Subaru service recommendations for Legacy battery cold cranking amps and reserve capacity. Get help figuring out the battery size that's best for your Legacy, and schedule a fast car battery replacement at your earliest convenience.

Is There a DieHard Battery for Legacys?

Your Subaru Legacy deserves the best, which is why we carry just that. Your Legacy needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard batteries shatter expectations and house the latest technology to meet the growing power needs of new vehicles. They're no ordinary battery, they're extraordinary. Buy a DieHard battery for your Subaru Legacy and drive with confidence knowing that your battery will perform when you need it. That’s why you should choose batteries from Firestone Complete Auto Care.

After Buying 2021 Subaru Legacy Battery

Did you recently have a new 2021 Subaru Legacy car battery installed? Great job! You can give your new battery a head start with proper care and attention. ensuring all the lights are turned off before you leave the car, cutting back on unnecessary short trips, keeping the battery posts corrosion-free, and avoiding radio and electronic component use when the engine is off.

Commonly Asked Legacy Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have a battery question that's unique to your Subaru Legacy battery, pay us a visit. Our technicians are happy to help.

Why won't my Legacy battery stay charged? A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you’ve been leaving the doors slightly open and the dome lights on during the night. Stop by for a free battery test at your local Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old Legacy battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much will replacing my Subaru Legacy’s battery cost if I get a DieHard battery? Get affordable prices on Subaru Legacy 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 often should I replace my 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.
Why is there white, crusty buildup on my Legacy’s battery post? A chemical reaction between battery acid and the air can cause a white, crusty buildup to form on the terminals of your Legacy car battery. This buildup — known as corrosion — can impede the flow of electricity and cause a range of issues, from poor performance to premature battery failure.
How do I remove corrosion from my Legacy car battery? Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.
Where can I find a battery for my Legacy? Your local Firestone Complete Auto Care sells and installs Legacy batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.