Why doesn’t my FX45 battery stay charged?

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 free battery test at your nearest Firestone Complete Auto Care to learn more about the state of your battery.

What do you do with my old FX45 battery?

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

How much will replacing my Infiniti FX45’s battery cost if I get a DieHard battery?

Infiniti FX45 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?

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.

What is the white, crusty stuff around my FX45’s battery post?

The white, crusty stuff that can accumulate around FX45 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.

What do I do about corrosion on my FX45 car 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.

Who carries FX45 batteries near me?

Your local Firestone Complete Auto Care sells and installs FX45 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

Car Batteries for 2003 Infiniti FX45

Get a New Infiniti Battery

Get a New Infiniti FX45 Battery

Don't let a failing battery slow you down. Shop replacement batteries for 2003 Infiniti FX45s today and schedule a quick installation at Firestone Complete Auto Care.

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2003 Infiniti FX45 Battery Replacement & Size

Not sure what battery to get for your Infiniti FX45? Use the following chart to find information on Infiniti FX45 battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
26R-3	V8/4.5L	Replacement 24 months	Performance months	575
35-2	V8/4.5L	Replacement 36 months	Performance months	640
35-AGM	V8/4.5L	Replacement 36 months	Performance months	650

BATTERIES
V8/4.5L - Battery: 26R-3 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 575
V8/4.5L - Battery: 35-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 640
V8/4.5L - Battery: 35-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 650

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Shopping for Infiniti FX45 Car Batteries

Your FX45 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 Infiniti FX45 stranded. Watch for signs that your current battery is getting too old or too weak. A sluggish engine start, an illuminated check engine light or battery signal, bloated battery case, corroded battery terminals, or faded headlights can all signal that your battery is waving goodbye.

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. Drop in for a free battery check and, if necessary, a battery replacement to help keep your 2003 Infiniti FX45 running! Car batteries are one of our many specialties! Our expert technicians understand Infiniti service recommendations for FX45 car batteries’ reserve capacities and cold cranking amps. Get help identifying the type and size of battery that's best for your FX45, and schedule a weekday or weekend battery replacement service for your car.

Is There a DieHard Battery for FX45s?

Your Infiniti FX45 deserves the best, which is why we exclusively carry the best. You need a reliable, durable and powerful battery in extremely hot and cold environments. DieHard batteries shatter expectations and house the latest technology to satisfy the expanding power needs of modern vehicles They're no ordinary battery, they're extraordinary. Buy a DieHard battery for your Infiniti FX45 and get behind the wheel with confidence. Why? Because performance will be there when you're counting on it. That's the kind of battery we deliver.

Making Your FX45’s New Battery Last

Did you recently have a new 2003 Infiniti FX45 car battery installed? Good thinking! Give your new car battery the best start with proper care. Give your new battery a hand by cutting back on unnecessary short trips, keeping the battery posts corrosion-free, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your FX45 Car Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have a FX45-specific battery question, stop by your nearest store. Our technicians have the answers.

Why doesn’t my FX45 battery stay charged? 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 free battery test at your nearest Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my old FX45 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much will replacing my Infiniti FX45’s battery cost if I get a DieHard battery? Infiniti FX45 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? 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.
What is the white, crusty stuff around my FX45’s battery post? The white, crusty stuff that can accumulate around FX45 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.
What do I do about corrosion on my FX45 car 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.
Who carries FX45 batteries near me? Your local Firestone Complete Auto Care sells and installs FX45 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.