Why won't my 911 battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. It may be getting old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop by for a complimentary 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 911 battery?

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

How much will replacing my Porsche 911’s battery cost if I get a DieHard battery?

Get affordable prices on Porsche 911 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 substance accumulating on my 911’s battery post?

If you notice white, crusty stuff around the battery terminals of your 911, 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 911’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I remove corrosion from my 911 car battery?

You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your 911 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 purchase 911 batteries near me?

Your local Firestone Complete Auto Care sells and installs 911 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

Car Batteries for 1989 Porsche 911

Get a New Porsche Battery

Porsche 911 Batteries Near You

Don’t let a dead battery stop you. Shop replacement car batteries for your 1989 Porsche 911 at Firestone Complete Auto Care.

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1989 Porsche 911 Battery Replacement & Size

Need more info about Porsche 911 batteries? Use this chart to find the right battery size and CCAs for your Porsche 911.

Battery	Engine	Warranty		Cold Cranking Amps
49H8	H6/3.3L	Replacement 36 months	Performance months	900
H8-AGM	H6/3.3L	Replacement 36 months	Performance months	900
T6	H6/3.2L	Replacement 36 months	Performance months	720
H8-AGM	H6/3.2L	Replacement 36 months	Performance months	900
T6	H6/3.6L	Replacement 36 months	Performance months	720
H6-AGM	H6/3.6L	Replacement 36 months	Performance months	760

BATTERIES
H6/3.3L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
H6/3.3L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
H6/3.2L - Battery: T6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 720
H6/3.2L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
H6/3.6L - Battery: T6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 720
H6/3.6L - Battery: H6-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 760

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Buying a Replacement Battery for Porsche 911

You can pretty much drive your Porsche 911 until you don't want to anymore. But your 911's battery? Don't count on it to last forever. On average, auto batteries last anywhere from three to five years. You want to replace your 1989 Porsche 911 battery before it fails and leaves you stranded. Pay attention to clues that your battery is on its way out. A sluggish engine start, 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.

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. Visit us for a complimentary battery check and, if necessary, a battery replacement to help keep your 1989 Porsche 911 running! Car batteries are only one of our many strong suits. Our technicians are well-acquainted with Porsche’s service specs for 911 battery CCAs and reserve capacity. Get help choosing the battery size that matches your vehicle, and schedule a fast car battery replacement at your earliest convenience.

Firestone Has DieHard Batteries for 911s

We only want what’s best for your Porsche 911, which is why we exclusively carry the best. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard batteries shatter expectations using the latest innovative technology to meet the increasing power needs of modern vehicles Don't call a DieHard battery ordinary. It's an extraordinary battery. Choose a DieHard battery for your Porsche 911 and get behind the wheel with confidence. Why? Because your battery will perform when you need it. That’s why you should choose batteries from Firestone Complete Auto Care.

After Buying 1989 Porsche 911 Battery

Have you recently had a fresh battery installed in your Porsche 911? Good thinking! You can give your new battery a head start with proper care and attention. Help extend your car battery’s life by limiting short trips, keeping the battery posts corrosion-free, and not using electronics such as the radio and power outlets when the engine is off.

Commonly Asked 911 Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have battery questions that are Porsche 911-specific, visit your nearest store. Our technicians have the answers.

Why won't my 911 battery stay charged? A car battery that needs to be jump-started every time is as good as dead. It may be getting old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop by for a complimentary 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 911 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much will replacing my Porsche 911’s battery cost if I get a DieHard battery? Get affordable prices on Porsche 911 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 substance accumulating on my 911’s battery post? If you notice white, crusty stuff around the battery terminals of your 911, 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 911’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I remove corrosion from my 911 car battery? You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your 911 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 purchase 911 batteries near me? Your local Firestone Complete Auto Care sells and installs 911 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.