Why won’t my M3 battery hold a charge?

A car battery that needs to be jump-started every time is as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the lights on overnight. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old M3 battery?

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

What’s the cost of DieHard batteries for BMW M3s?

Get affordable prices on BMW M3 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.

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 M3’s battery post?

The white, crusty stuff that can accumulate around M3 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.

What do I do about corrosion on my M3 car battery?

Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.

Who carries M3 batteries near me?

When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install M3 batteries at our stores nationwide — and our Firestone Direct mobile vans can provide convenient on-site battery services. Learn more about our mobile battery services and book an appointment.

Car Batteries for 2003 BMW M3

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BMW M3 Batteries Near You

Don’t let a dead battery stop you. Shop replacement car batteries for your 2003 BMW M3 at Firestone Complete Auto Care.

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Battery Size & Replacement for 2003 BMW M3

Not sure what battery to get for your BMW M3? Check the chart to find the right car battery size and cold cranking amps for your M3.

Battery	Engine	Warranty		Cold Cranking Amps
94RH7	L6/3.2L	Replacement 36 months	Performance months	800
H7-AGM	L6/3.2L	Replacement 36 months	Performance months	850

BATTERIES
L6/3.2L - Battery: 94RH7 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
L6/3.2L - Battery: H7-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 850

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Shopping for BMW M3 Car Batteries

You can pretty much drive your BMW M3 until you don't want to anymore. But your M3's battery? Don't count on it to last forever. The average car battery lasts three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your BMW M3 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, corroded battery posts, and subpar electrical performance can all signal that your battery is on its last leg.

Or, you can get a complimentary battery check at your nearest 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 2003 BMW M3 running! Automotive batteries are just one of our many areas of expertise. Our technicians are well-acquainted with BMW’s service specs for M3 battery cold cranking amps and reserve capacity. Get help choosing the battery size that's best for your M3, and schedule a fast car battery replacement at your earliest convenience.

Find the Right DieHard Battery for Your M3

We only want what’s best for your BMW M3, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery that can handle most extreme environments and weather conditions. DieHard batteries go above and beyond using state-of-the-art advancements to satisfy the expanding power demands of modern vehicles A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your BMW M3 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.

Making Your M3’s New Battery Last

Have you recently had a fresh battery installed in your BMW M3? Congrats! 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, cutting back on unnecessary short trips, cleaning your battery posts, and avoiding radio and electronic component use when the engine is off.