Why won't my 745i battery stay charged?

A battery that won't hold a charge is almost as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the lights on overnight. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old 745i battery?

We’ll recycle your car battery for you!

How much do DieHard batteries cost for your BMW 745i?

BMW 745i 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?

A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.

What is the white, crusty substance accumulating on my 745i’s battery post?

The white, flaky stuff that can build up around your 745i’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your 745i, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.

How do I clean corrosion off my 745i 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 745i 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 745i?

When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install 745i 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 745i Car Batteries

Get a New BMW Battery

Get a New BMW 745i Battery

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 2005 BMW 745i today and schedule a quick installation at Firestone Complete Auto Care.

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Buy the Right Battery for Your BMW 745i

You can pretty much drive your BMW 745i until you don't want to anymore. But your 745i's battery? Don't count on it to last forever. Generally, car batteries last from three to five years. You want to replace your 2005 BMW 745i battery before it fails and leaves you 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, bloated battery case, corrosion-covered posts, or dim headlights can all be signs 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 745i running! Car batteries are one of our many specialties! Our technicians are well-acquainted with BMW’s service specs for 745i car batteries’ reserve capacities and cold cranking amps. Get help figuring out the battery size that's best for your 745i, and schedule an appointment today for a quick car battery replacement.

Why Choose a DieHard Battery for Your 745i?

We only want what’s best for your BMW 745i, which is why we carry just that. Your 745i needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard batteries shatter expectations using the latest innovative technology to fuel the growing power needs of new vehicles and their accessories. A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your BMW 745i and drive with confidence knowing that performance will be there when you need it most. That's the kind of battery we deliver.

Caring for a New BMW 745i Battery

Got a new car battery installed in your 2005 BMW 745i? Good thinking! Give your new car battery the best start with proper care. ensuring all the lights are turned off before you leave the car, decreasing the number of short trips you take, keeping the battery posts corrosion-free, and avoiding radio and electronic component use when the engine is off.