Why doesn’t my 928 battery stay charged?

A battery is in its final hour when it will no longer hold a charge. The battery may be too old. Or, you may have been leaving your car doors ajar and the cabin light at night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and get a handle on your car battery’s health.

What happens to my old 928 battery?

We recycle it, taking care of both your car and the Earth.

How much will replacing my Porsche 928’s battery cost if I get a DieHard battery?

Get affordable prices on Porsche 928 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?

Car battery lifespan varies depending on a few factors, including driving conditions, accessories, how well it’s maintained, and the type of battery. On average, a car battery lasts about three to five years.

Why is there white, crusty buildup on my 928’s battery post?

The white, crusty stuff that can accumulate around 928 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 corrosion off my 928 vehicle battery?

Regularly inspecting and cleaning your battery terminals will help keep your 928’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.

Where can I find a battery for my 928?

At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install 928 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.

Car Batteries for 1989 Porsche 928

Get a New Porsche Battery

Get a New Porsche 928 Battery

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 1989 Porsche 928 today and schedule a quick installation at Firestone Complete Auto Care.

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1989 Porsche 928 Battery Replacement & Size

Not sure what battery to get for your Porsche 928? Use the following chart to find information on Porsche 928 battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
48H6	V8/5.0L	Replacement 36 months	Performance months	730
H6-AGM	V8/5.0L	Replacement 36 months	Performance months	760

BATTERIES
V8/5.0L - Battery: 48H6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 730
V8/5.0L - Battery: H6-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 760

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Buy the Right Battery for Your Porsche 928

Your 928 doesn't have an expiration date, but its battery does. Generally, car batteries last from three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Porsche 928 stranded. Watch for signs that your current battery is getting too old or too weak. A sluggish engine start, an illuminated battery or check engine light, swollen battery case, corroded battery terminals, or weak lights can all signal that your battery is on its last leg.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. With best-in-class tools we can tell you how much "life" is left in your battery. Stop by for a free battery test and, if necessary, a battery replacement to help keep your 1989 Porsche 928 running! Car batteries are one of our many specialties! Our technicians are familiar with Porsche-specific recommendations for 928 battery CCAs and reserve capacity. Get help choosing the battery size that's best for your 928, and schedule a fast car battery replacement at your earliest convenience.

Firestone Has DieHard Batteries for 928s

We know what’s best for your Porsche 928, which is why we exclusively carry the best. Your vehicle needs a reliable, durable and powerful battery in extremely hot and cold environments. DieHard batteries shatter expectations using state-of-the-art advancements to fuel the growing power needs of new vehicles. They're no ordinary battery, they're extraordinary. Buy a DieHard battery for your Porsche 928 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 928 Battery

Did you recently have a new 1989 Porsche 928 car battery installed? Great job! Now, help it last longer and stay charged by caring for it from the get-go. turning off all of the lights when you leave your vehicle, decreasing the number of short trips you take, keeping your battery posts clean, and not using electronics such as the radio and power outlets when the engine is off.

Answers to Your 928 Car Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have battery questions that are Porsche 928-specific, visit your nearest store. Our expert techs have the answers you need.

Why doesn’t my 928 battery stay charged? A battery is in its final hour when it will no longer hold a charge. The battery may be too old. Or, you may have been leaving your car doors ajar and the cabin light at night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and get a handle on your car battery’s health.
What happens to my old 928 battery? We recycle it, taking care of both your car and the Earth.
How much will replacing my Porsche 928’s battery cost if I get a DieHard battery? Get affordable prices on Porsche 928 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? Car battery lifespan varies depending on a few factors, including driving conditions, accessories, how well it’s maintained, and the type of battery. On average, a car battery lasts about three to five years.
Why is there white, crusty buildup on my 928’s battery post? The white, crusty stuff that can accumulate around 928 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 corrosion off my 928 vehicle battery? Regularly inspecting and cleaning your battery terminals will help keep your 928’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.
Where can I find a battery for my 928? At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install 928 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.