Why won’t my Bonneville battery hold a charge?

A battery is in its final hour when it will no longer hold a charge. 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 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 Bonneville battery?

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

How much do DieHard batteries cost for your Pontiac Bonneville?

Pontiac Bonneville 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.

What is the average lifespan of a 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 Bonneville’s battery post?

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

How do I clean corrosion off my Bonneville 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 Bonneville 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.

Who carries Bonneville batteries near me?

You can shop for Bonneville 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.

1985 Pontiac Bonneville Batteries

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Get a Battery for Your Pontiac Bonneville

Don't let a failing battery slow you down. Shop replacement batteries for 1985 Pontiac Bonnevilles today and schedule a quick installation at Firestone Complete Auto Care.

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The Right Battery Size for a 1985 Pontiac Bonneville

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

Battery	Engine	Warranty		Cold Cranking Amps
78-1	V6/3.8L	Replacement 24 months	Performance months	700
78FT-2	V6/3.8L	Replacement 36 months	Performance months	800
78-AGM	V6/3.8L	Replacement 36 months	Performance months	740
75-2	V8/5.0L	Replacement 24 months	Performance months	650
75FT-3	V8/5.0L	Replacement 36 months	Performance months	700
78-AGM	V8/5.0L	Replacement 36 months	Performance months	740

BATTERIES
V6/3.8L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
V6/3.8L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V6/3.8L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
V8/5.0L - Battery: 75-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 650
V8/5.0L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
V8/5.0L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740

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Shopping for Pontiac Bonneville Car Batteries

Your Bonneville doesn't have an expiration date, but its battery does. The average car battery lasts three to five years. You want to replace your 1985 Pontiac Bonneville battery before it fails and leaves you stranded. Pay attention to clues that your battery is on its way out. A slow engine crank, a blinking battery or check engine light, swollen battery case, corroded battery posts, or faded headlights can all signal that your battery is on its last leg.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With best-in-class tools we can tell you how much "life" is left in your battery. Drop in for a free battery check and, if necessary, a battery replacement to help keep your 1985 Pontiac Bonneville running! Car batteries are only one of our many strong suits. Our technicians are well-acquainted with Pontiac’s service specs for Bonneville car batteries’ reserve capacities and cold cranking amps. Get help figuring out the battery size that fits your car perfectly, and schedule an appointment today for a quick car battery replacement.

Why Choose a DieHard Battery for Your Bonneville?

Your Pontiac Bonneville deserves the best, which is why we exclusively carry the best. Your vehicle needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard Bonneville batteries surpass expectations using the latest innovative technology to fuel the growing power demands of modern vehicles A DieHard battery isn't an ordinary car battery. It's extraordinary. Go with a DieHard battery for your Bonneville and get behind the wheel with confidence. Why? Because performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

After Buying 1985 Pontiac Bonneville Battery

Did you recently have a new 1985 Pontiac Bonneville car battery installed? Good thinking! You can give your new battery a head start with proper care and attention. Help extend your car battery’s life by cutting back on unnecessary short trips, keeping the battery posts corrosion-free, and not using electronics such as the radio and power outlets when the engine is off.