Why doesn’t my Z4 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 Z4 battery?

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

What’s the cost of DieHard batteries for BMW Z4s?

BMW Z4 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 often should I replace my car battery?

The typical 12-volt car battery may last three to five years, depending on the type of battery, the driving conditions, and how well the battery is maintained.

What is the white, crusty substance accumulating on my Z4’s battery post?

The white, crusty stuff that can accumulate around Z4 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 Z4 car battery?

Regularly inspecting and cleaning your battery terminals will help keep your Z4’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 carries Z4 batteries near me?

You can shop for Z4 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.

2003 BMW Z4 Car Batteries

Get a New BMW Battery

Get a New BMW Z4 Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 2003 BMW Z4 at Firestone Complete Auto Care.

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The Right Battery Size for a 2003 BMW Z4

Researching battery replacements for your BMW Z4? Check the chart to find the right car battery size and cold cranking amps for your Z4.

Battery	Engine	Warranty		Cold Cranking Amps
91-1	L6/2.5L	Replacement 24 months	Performance months	615
48H6	L6/2.5L	Replacement 36 months	Performance months	730
H6-AGM	L6/2.5L	Replacement 36 months	Performance months	760
91-1	L6/3.0L	Replacement 24 months	Performance months	615
48H6	L6/3.0L	Replacement 36 months	Performance months	730
H6-AGM	L6/3.0L	Replacement 36 months	Performance months	760

BATTERIES
L6/2.5L - Battery: 91-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 615
L6/2.5L - Battery: 48H6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 730
L6/2.5L - Battery: H6-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 760
L6/3.0L - Battery: 91-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 615
L6/3.0L - Battery: 48H6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 730
L6/3.0L - Battery: H6-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 760

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Buying a Replacement Battery for BMW Z4

You can pretty much drive your BMW Z4 until you don't want to anymore. But your Z4's battery? Don't count on it to last forever. Generally, car batteries last from three to five years. Don’t get stranded by your Z4’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A sluggish engine start, an illuminated battery or check engine light, swollen battery case, corroded battery posts, or faded headlights may all indicate 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. Visit us for a complimentary battery check and, if necessary, a battery replacement to help keep your 2003 BMW Z4 running! Car batteries are one of our many specialties! Our technicians are familiar with BMW-specific recommendations for Z4 battery cold cranking amps and reserve capacity. Get help identifying the type and size of battery that matches your vehicle, and schedule an appointment today for a quick car battery replacement.

Is There a DieHard Battery for Z4s?

We know what’s best for your BMW Z4, which is why we exclusively carry the best. Your Z4 needs a reliable, durable and powerful battery in extremely hot and cold environments. DieHard batteries go above and beyond and house the latest technology to fuel the expanding power requirements of new vehicles and their accessories. They're no ordinary battery, they're extraordinary. Go with a DieHard battery for your Z4 and get behind the wheel with confidence. Why? Because your battery will perform when you need it. That’s why you should choose batteries from Firestone Complete Auto Care.

Caring for a New BMW Z4 Battery

Got a new car battery installed in your 2003 BMW Z4? Congrats! Give your new car battery the best start with proper care. Help extend your car battery’s life by limiting short trips, keeping the battery posts corrosion-free, and not playing the radio or using other electronics when the engine is turned off.