2021 BMW M340i Batteries

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Get a Battery for Your BMW M340i

Don't let a failing battery slow you down. Shop replacement batteries for 2021 BMW M340is today and schedule a quick installation at Firestone Complete Auto Care.

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2021 BMW M340i Battery Replacement & Size

Researching battery replacements for your BMW M340i? Use the following chart to find information on BMW M340i battery size and cold cranking amps.

Battery Engine Warranty Cold Cranking Amps
H8-AGM L6/3.0L Replacement 36 months Performance months 900
BATTERIES

L6/3.0L

- Battery: H8-AGM

- Warranty: Replacement 36 months, Performance months

- Cold Cranking Amps: 900

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Buying a Replacement Battery for BMW M340i

Your M340i 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 BMW M340i stranded. Look out for symptoms of a faulty car battery. A lagging starter, an illuminated battery or check engine light, bloated battery case, corrosion-covered posts, and subpar electrical performance can all be signs that your battery is waving goodbye.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. With computerized testing we can see how much charge is left in your battery. Drop in for a free battery check and, if needed, a replacement battery for your 2021 BMW M340i. Car batteries are one of our many specialties! Our expert technicians understand BMW service recommendations for M340i battery CCAs and reserve capacity. Get help figuring out the battery size that fits your car perfectly, and schedule a weekday or weekend battery replacement service for your car.

Find the Right DieHard Battery for Your M340i

We only want what’s best for your BMW M340i, which is why we carry just that. You need a reliable, durable and powerful battery in extremely hot and cold environments. DieHard batteries shatter expectations using the latest innovative technology to meet the growing power needs of new vehicles. They're no ordinary battery, they're extraordinary. Choose a DieHard battery for your BMW M340i and get behind the wheel with confidence. Why? Because performance will be there when you need it most. That's the kind of battery we deliver.

Caring for a New BMW M340i Battery

Did you recently have a new 2021 BMW M340i car battery installed? Congrats! Now, help it last longer and stay charged by caring for it from the get-go. Help extend your car battery’s life by limiting short trips, cleaning your battery posts, and not using electronics such as the radio and power outlets when the engine is off.

Top M340i Car Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have a M340i-specific battery question, visit your nearest store. Our expert techs have the answers you need.

  • Why won't my M340i battery stay charged? A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have been leaving your car doors ajar and the lights on overnight. Stop in for a free battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.
  • What happens to my old M340i battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
  • How much will replacing my BMW M340i’s battery cost if I get a DieHard battery? BMW M340i 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 do car batteries last? You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.
  • Why is there white, crusty buildup on my M340i’s battery post? If you notice white, crusty stuff around the battery terminals of your M340i, 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 M340i’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
  •  How do I clean corrosion off my M340i 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 M340i 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 find a battery for my M340i? When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install M340i 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.