Why won't my Legacy 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 may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old Legacy battery?

We’ll recycle your car battery for you!

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

Subaru Legacy batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes 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 substance accumulating on my Legacy’s battery post?

If you notice white, crusty stuff around the battery terminals of your Legacy, 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 Legacy’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean a corroded Legacy battery terminal?

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.

Who carries Legacy batteries near me?

When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install Legacy batteries at our stores nationwide — and our Firestone Direct mobile vans can provide convenient on-site battery services. Learn more about our mobile battery services and book an appointment.

2004 Subaru Legacy Car Batteries

Get a New Subaru Battery

Get a New Subaru Legacy Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 2004 Subaru Legacy at Firestone Complete Auto Care.

Shop Batteries

2004 Subaru Legacy Battery Replacement & Size

Need more info about Subaru Legacy batteries? Use this chart to find the right battery size and CCAs for your Subaru Legacy.

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

Schedule an Appointment

Shopping for Subaru Legacy Car Batteries

Sadly, your Subaru Legacy won't last forever. Neither will its battery. 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 Legacy stranded. Look out for symptoms of a faulty car battery. A slow engine crank, an illuminated check engine light or battery signal, bloated battery case, corroded battery terminals, and subpar electrical performance can all be signs that your battery is waving goodbye.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. With computerized testing we can see how much charge is left in your battery. Drop in for a free battery check and, if needed, get your Subaru Legacy a replacement battery. Automotive batteries are just one of our many areas of expertise. Our technicians are well-acquainted with Subaru’s service specs for Legacy battery cold cranking amps 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 Legacys

We only want what’s best for your Subaru Legacy, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard Legacy batteries surpass expectations and house the latest technology to meet the expanding power demands of new vehicles. They're no ordinary battery, they're extraordinary. Choose a DieHard battery for your Subaru Legacy and have the peace of mind that performance will be there when you're counting on it. That's the kind of battery we deliver.

Caring for a New Subaru Legacy Battery

Got a new car battery installed in your 2004 Subaru Legacy? Congrats! Now, help it last longer and stay charged by caring for it from the get-go. flipping the dome lights and headlights off when exiting the car, limiting 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 Legacy Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have battery questions that are Subaru Legacy-specific, visit your nearest store. Our technicians are happy to help.

Why won't my Legacy 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 may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old Legacy battery? We’ll recycle your car battery for you!
How much will replacing my Subaru Legacy’s battery cost if I get a DieHard battery? Subaru Legacy batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes 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 substance accumulating on my Legacy’s battery post? If you notice white, crusty stuff around the battery terminals of your Legacy, 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 Legacy’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean a corroded Legacy battery terminal? 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.
Who carries Legacy batteries near me? When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install Legacy batteries at our stores nationwide — and our Firestone Direct mobile vans can provide convenient on-site battery services. Learn more about our mobile battery services and book an appointment.