Why won’t my 911 battery hold a charge?

A battery that won't hold a charge is almost as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the cabin light at night. Stop in for a free battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.

What do you do with my old 911 battery?

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

How much do DieHard batteries cost for your Porsche 911?

Porsche 911 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 often should I replace my car battery?

A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.

Why is there white, crusty buildup 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 clean corrosion off my 911 vehicle 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?

You can shop for 911 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.

1986 Porsche 911 Batteries

Get a New Porsche Battery

Get a New Porsche 911 Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 1986 Porsche 911 at Firestone Complete Auto Care.

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Battery Size & Replacement for 1986 Porsche 911

Researching battery replacements for your Porsche 911? Use this chart to find the right battery size and CCAs for your Porsche 911.

Battery	Engine	Warranty		Cold Cranking Amps
48H6	H6/3.2L	Replacement 36 months	Performance months	730
H8-AGM	H6/3.2L	Replacement 36 months	Performance months	900
49H8	H6/3.3L	Replacement 36 months	Performance months	900
H8-AGM	H6/3.3L	Replacement 36 months	Performance months	900

BATTERIES
H6/3.2L - Battery: 48H6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 730
H6/3.2L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
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

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Shopping for Porsche 911 Car Batteries

Your 911 doesn't have an expiration date, but its battery does. On average, auto batteries last anywhere from three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Porsche 911 stranded. Watch for signs that your current battery is getting too old or too weak. A slow engine crank, an illuminated battery or check engine light, swollen battery case, corrosion-covered posts, and subpar electrical performance may all indicate that your battery needs attention.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. Our equipment can see how much charge is left in your battery. Stop by for a free battery test and, if needed, get your Porsche 911 a replacement battery. Car batteries are one of our many specialties! Our expert technicians understand Porsche service recommendations for 911 car batteries’ reserve capacities and cold cranking amps. Get help choosing the battery size that fits your car perfectly, and schedule an appointment today for a quick car battery replacement.

Find the Right DieHard Battery for Your 911

Your Porsche 911 deserves the best, which is why we only carry top-of-the-line replacement parts and batteries. Your vehicle needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard 911 batteries surpass expectations using the latest innovative technology to fuel the increasing power needs of new vehicles and their accessories. Don't call a DieHard battery ordinary. It's an extraordinary battery. Choose a DieHard battery for your Porsche 911 and have the peace of mind that performance will be there when you're counting on it. That’s why you should choose batteries from Firestone Complete Auto Care.

Making Your 911’s New Battery Last

Did you recently have a new 1986 Porsche 911 car battery installed? Congrats! Give your new car battery the best start with proper care. ensuring all the lights are turned off before you leave the car, limiting short trips, keeping the battery posts corrosion-free, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your 911 Car Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have a 911-specific battery question, visit your nearest store. Our expert techs have the answers you need.

Why won’t my 911 battery hold a charge? A battery that won't hold a charge is almost as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the cabin light at night. Stop in for a free battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my old 911 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much do DieHard batteries cost for your Porsche 911? Porsche 911 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 often should I replace my car battery? A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.
Why is there white, crusty buildup 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 clean corrosion off my 911 vehicle 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? You can shop for 911 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.