Why won't my 540i battery stay charged?

A battery is in its final hour when it will no longer hold a charge. The battery may be too old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a free battery test at your nearest Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old 540i battery?

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

What’s the cost of DieHard batteries for BMW 540is?

BMW 540i 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.

Why is there white, crusty buildup on my 540i’s battery post?

The white, crusty stuff that can accumulate around 540i 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 remove corrosion from my 540i car battery?

To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your 540i owner’s manual for instructions on how to do so.

Where can I purchase 540i batteries near me?

At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install 540i batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.

1998 BMW 540i Car Batteries

Get a New BMW Battery

Get a New BMW 540i Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 1998 BMW 540i at Firestone Complete Auto Care.

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1998 BMW 540i Battery Replacement & Size

Need more info about BMW 540i batteries? Use the following chart to find information on BMW 540i battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
49H8	V8/4.4L	Replacement 36 months	Performance months	900
H8-AGM	V8/4.4L	Replacement 36 months	Performance months	900

BATTERIES
V8/4.4L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
V8/4.4L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900

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Shopping for BMW 540i Car Batteries

Your 540i doesn't have an expiration date, but its battery does. Generally, car batteries last from three to five years. You want to replace your 1998 BMW 540i battery before it fails and leaves you stranded. Look out for symptoms of a faulty car battery. A slow engine crank, a blinking battery or check engine light, bloated battery case, corroded battery posts, or dim headlights can all signal that your battery needs attention.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. With computerized testing we can see how much charge is left in your battery. Stop by for a free battery test and, if needed, get your BMW 540i a replacement battery. Car batteries are one of our many specialties! Our technicians are familiar with BMW-specific recommendations for 540i battery CCAs and reserve capacity. Get help figuring out the battery size that fits your car perfectly, and schedule a fast car battery replacement at your earliest convenience.

Why Choose a DieHard Battery for Your 540i?

We only want what’s best for your BMW 540i, which is why we carry just that. Your 540i needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard 540i batteries surpass expectations using the latest innovative technology to meet the expanding power needs of new vehicles. A DieHard battery isn't an ordinary car battery. It's extraordinary. Choose a DieHard battery for your BMW 540i and have the peace of mind that performance will be there when you're counting on it. That’s why you should choose batteries from Firestone Complete Auto Care.

Making Your 540i’s New Battery Last

Have you recently had a fresh battery installed in your BMW 540i? Great job! Give your new car battery the best start with proper care. You can take care of your battery by limiting short trips, cleaning your battery posts, and not playing the radio or using other electronics when the engine is turned off.

Commonly Asked 540i Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have a 540i-specific battery question, visit your nearest store. Our expert techs have the answers you need.

Why won't my 540i battery stay charged? A battery is in its final hour when it will no longer hold a charge. The battery may be too old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a free battery test at your nearest Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old 540i battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
What’s the cost of DieHard batteries for BMW 540is? BMW 540i 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.
Why is there white, crusty buildup on my 540i’s battery post? The white, crusty stuff that can accumulate around 540i 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 remove corrosion from my 540i car battery? To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your 540i owner’s manual for instructions on how to do so.
Where can I purchase 540i batteries near me? At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install 540i batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.