Why won't my 740i battery stay charged?

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 dome lights on during the night. Stop in for a free battery check at your favorite Firestone Complete Auto Care and get a handle on your car battery’s health.

What do you do with my old 740i battery?

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

How much do DieHard batteries cost for your BMW 740i?

You can find affordable 740i batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.

How long is a car battery good for?

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 740i’s battery post?

The white, crusty stuff that can accumulate around 740i 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 740i vehicle 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.

Where can I find a battery for my 740i?

You can shop for 740i 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.

1998 BMW 740i Batteries

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Get a Battery for Your BMW 740i

Don’t let a dead battery stop you. Shop replacement car batteries for your 1998 BMW 740i at Firestone Complete Auto Care.

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1998 BMW 740i Battery Replacement & Size

Researching battery replacements for your BMW 740i? Use the following chart to find information on BMW 740i battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
95R/H9	V8/4.4L	Replacement 36 months	Performance months	950
H9-AGM	V8/4.4L	Replacement 36 months	Performance months	950

BATTERIES
V8/4.4L - Battery: 95R/H9 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 950
V8/4.4L - Battery: H9-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 950

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Buy the Right Battery for Your BMW 740i

Sadly, your BMW 740i won't last forever. Neither will its battery. 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 BMW 740i stranded. Watch for signs that your current battery is getting too old or too weak. A sluggish engine start, a blinking battery or check engine light, bloated battery case, corroded battery posts, or dim headlights can all be signs that your battery is waving goodbye.

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. Stop by for a free battery test and, if necessary, a battery replacement to help keep your 1998 BMW 740i running! Car batteries are one of our many specialties! Our technicians are familiar with BMW-specific recommendations for 740i car batteries’ reserve capacities and cold cranking amps. Get help figuring out the battery size that matches your vehicle, and schedule a weekday or weekend battery replacement service for your car.

Firestone Has DieHard Batteries for 740is

Your BMW 740i deserves the best, which is why we exclusively carry the best. Your 740i needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard batteries shatter expectations using the latest innovative technology to meet the growing power needs of modern vehicles A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your BMW 740i and have the peace of mind that performance will be there when you need it most. That's the kind of battery we deliver.

Making Your 740i’s New Battery Last

Did you recently have a new 1998 BMW 740i car battery installed? Great job! Now, help it last longer and stay charged by caring for it from the get-go. Give your new battery a hand by limiting short trips, keeping the battery posts corrosion-free, and not using electronics such as the radio and power outlets when the engine is off.

Commonly Asked 740i Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have a 740i-specific battery question, stop by your nearest store. Our expert techs have the answers you need.

Why won't my 740i battery stay charged? 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 dome lights on during the night. Stop in for a free battery check at your favorite Firestone Complete Auto Care and get a handle on your car battery’s health.
What do you do with my old 740i battery? We recycle it, taking care of both your car and the Earth.
How much do DieHard batteries cost for your BMW 740i? You can find affordable 740i batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.
How long is a car battery good for? 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 740i’s battery post? The white, crusty stuff that can accumulate around 740i 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 740i vehicle 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.
Where can I find a battery for my 740i? You can shop for 740i 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.