Why won’t my Z4 battery hold a charge?

A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you’ve been leaving the doors slightly open and the dome lights on during the night. Stop by for a complimentary battery check at your favorite Firestone Complete Auto Care and learn more about your battery's charge.

What do you do with my old Z4 battery?

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

How much do DieHard batteries cost for your BMW Z4?

Get affordable prices on BMW Z4 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.

How long can I expect my car battery to last?

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 stuff around my Z4’s battery post?

If you notice white, crusty stuff around the battery terminals of your Z4, 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 Z4’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I remove corrosion from my Z4 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 Z4 owner’s manual for instructions on how to do so.

Who sells Z4 batteries near me?

When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install Z4 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.

2005 BMW Z4 Car Batteries

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Get a Battery for Your BMW Z4

Don’t let a dead battery stop you. Shop replacement car batteries for your 2005 BMW Z4 at Firestone Complete Auto Care.

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The Right Battery Size for a 2005 BMW Z4

Need more info about BMW Z4 batteries? Use this chart to find the right battery size and CCAs for your BMW Z4.

Battery	Engine	Warranty		Cold Cranking Amps
91-1	L6/2.5L	Replacement 24 months	Performance months	615
94RH7	L6/2.5L	Replacement 36 months	Performance months	800
H6-AGM	L6/2.5L	Replacement 36 months	Performance months	760
91-1	L6/3.0L	Replacement 24 months	Performance months	615
47H5	L6/3.0L	Replacement 36 months	Performance months	650
H5-AGM	L6/3.0L	Replacement 36 months	Performance months	680

BATTERIES
L6/2.5L - Battery: 91-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 615
L6/2.5L - Battery: 94RH7 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
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: 47H5 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 650
L6/3.0L - Battery: H5-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 680

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Buying a Replacement Battery for BMW Z4

Your Z4 doesn't have an expiration date, but its battery does. 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 Z4 stranded. Watch for signs that your current battery is getting too old or too weak. A slow engine crank, a blinking battery or check engine light, swollen battery case, corroded battery posts, and subpar electrical performance may all indicate that your battery needs attention.

You can also get a Free Battery Test at your local 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 2005 BMW Z4 running! Car batteries are one of our many specialties! Our technicians are well-acquainted with BMW’s service specs for Z4 battery CCAs and reserve capacity. Get help choosing the battery size that's best for your Z4, and schedule a fast car battery replacement at your earliest convenience.

Find the Right DieHard Battery for Your Z4

We only want what’s best for your BMW Z4, which is why we exclusively carry the best. Your vehicle needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard batteries shatter expectations and house the latest technology to meet the growing power requirements of new vehicles. Don't call a DieHard battery ordinary. It's an extraordinary battery. Buy a DieHard battery for your BMW Z4 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.

Making Your Z4’s New Battery Last

Did you recently have a new 2005 BMW Z4 car battery installed? Good thinking! 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.