Why won’t my Diamante 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 may have a habit of leaving your car doors open and the lights on overnight. Stop in for a free battery check at your favorite Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old Diamante battery?

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

What’s the cost of DieHard batteries for Mitsubishi Diamantes?

Mitsubishi Diamante 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?

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.

What is the white, crusty substance accumulating on my Diamante’s battery post?

The white, flaky stuff that can build up around your Diamante’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your Diamante, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.

What do I do about corrosion on my Diamante car battery?

Regularly inspecting and cleaning your battery terminals will help keep your Diamante’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.

Who sells Diamante batteries near me?

Your local Firestone Complete Auto Care sells and installs Diamante 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 2003 Mitsubishi Diamante

Get a New Mitsubishi Battery

Get a New Mitsubishi Diamante Battery

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 2003 Mitsubishi Diamante today and schedule a quick installation at Firestone Complete Auto Care.

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The Right Battery Size for a 2003 Mitsubishi Diamante

Not sure what battery to get for your Mitsubishi Diamante? Use this chart to find the right battery size and CCAs for your Mitsubishi Diamante.

Battery	Engine	Warranty		Cold Cranking Amps
26-3	V6/3.5L	Replacement 24 months	Performance months	525
86-2	V6/3.5L	Replacement 36 months	Performance months	650

BATTERIES
V6/3.5L - Battery: 26-3 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 525
V6/3.5L - Battery: 86-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 650

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Buy the Right Battery for Your Mitsubishi Diamante

Sadly, your Mitsubishi Diamante won't last forever. Neither will its battery. Generally, car batteries last from three to five years. Don’t get stranded by your Diamante’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A slow engine crank, a blinking battery or check engine light, bloated battery case, corroded battery posts, or weak lights may all indicate that your battery is waving goodbye.

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 needed, get your Mitsubishi Diamante a replacement battery. Automotive batteries are just one of our many areas of expertise. Our technicians are well-acquainted with Mitsubishi’s service specs for Diamante car batteries’ reserve capacities and cold cranking amps. Get help choosing the battery size that's best for your Diamante, and schedule a fast car battery replacement at your earliest convenience.

Firestone Has DieHard Batteries for Diamantes

We only want what’s best for your Mitsubishi Diamante, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard batteries shatter expectations using state-of-the-art advancements to satisfy the growing power needs of new vehicles. Don't call a DieHard battery ordinary. It's an extraordinary battery. Buy a DieHard battery for your Mitsubishi Diamante and drive with confidence knowing that performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

Making Your Diamante’s New Battery Last

Did you recently have a new 2003 Mitsubishi Diamante car battery installed? Great job! Give your new car battery the best start with proper care. Give your new battery a hand by decreasing the number of short trips you take, keeping the battery posts corrosion-free, and avoiding radio and electronic component use when the engine is off.

Commonly Asked Diamante Battery Questions

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

Why won’t my Diamante 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 may have a habit of leaving your car doors open and the lights on overnight. Stop in for a free battery check at your favorite Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old Diamante battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
What’s the cost of DieHard batteries for Mitsubishi Diamantes? Mitsubishi Diamante 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? 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.
What is the white, crusty substance accumulating on my Diamante’s battery post? The white, flaky stuff that can build up around your Diamante’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your Diamante, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.
What do I do about corrosion on my Diamante car battery? Regularly inspecting and cleaning your battery terminals will help keep your Diamante’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.
Who sells Diamante batteries near me? Your local Firestone Complete Auto Care sells and installs Diamante batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.