Why doesn’t my Mountaineer battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop by for a free battery test at your favorite Firestone Complete Auto Care and get a handle on your car battery’s health.

What do you do with my dead Mountaineer battery?

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

How much will replacing my Mercury Mountaineer’s battery cost if I get a DieHard battery?

Mercury Mountaineer 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?

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

Why is there white, flaky stuff around my Mountaineer’s battery post?

The white, crusty stuff that can accumulate around Mountaineer 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 clean corrosion off my Mountaineer vehicle 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 Mountaineer owner’s manual for instructions on how to do so.

Where can I purchase Mountaineer batteries near me?

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

2003 Mercury Mountaineer Car Batteries

Get a New Mercury Battery

Mercury Mountaineer Batteries Near You

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

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The Right Battery Size for a 2003 Mercury Mountaineer

Researching battery replacements for your Mercury Mountaineer? Use the following chart to find information on Mercury Mountaineer battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
65-1	V6/4.0L	Replacement 24 months	Performance months	850
65-2	V6/4.0L	Replacement 36 months	Performance months	850
65-AGM	V6/4.0L	Replacement 36 months	Performance months	750
65-1	V8/4.6L	Replacement 24 months	Performance months	850
65-2	V8/4.6L	Replacement 36 months	Performance months	850
65-AGM	V8/4.6L	Replacement 36 months	Performance months	750

BATTERIES
V6/4.0L - Battery: 65-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 850
V6/4.0L - Battery: 65-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 850
V6/4.0L - Battery: 65-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 750
V8/4.6L - Battery: 65-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 850
V8/4.6L - Battery: 65-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 850
V8/4.6L - Battery: 65-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 750

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Buy the Right Battery for Your Mercury Mountaineer

Sadly, your Mercury Mountaineer won't last forever. Neither will its battery. On average, auto batteries last anywhere from three to five years. You want to replace your 2003 Mercury Mountaineer battery before it fails and leaves you stranded. Look out for symptoms of a faulty car battery. A lagging starter, a blinking battery or check engine light, bloated battery case, corroded battery posts, and subpar electrical performance can all be signs that your battery is on its last leg.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With computerized testing we can see how much charge is left in your battery. Stop by for a free battery test and, if needed, a replacement battery for your 2003 Mercury Mountaineer. Automotive batteries are just one of our many areas of expertise. Our technicians are well-acquainted with Mercury’s service specs for Mountaineer battery cold cranking amps and reserve capacity. Get help identifying the type and size of battery that fits your car perfectly, and schedule a weekday or weekend battery replacement service for your car.

Why Choose a DieHard Battery for Your Mountaineer?

Your Mercury Mountaineer deserves the best, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard Mountaineer batteries surpass expectations using state-of-the-art advancements to fuel the expanding power demands of new vehicles and their accessories. A DieHard battery isn't an ordinary car battery. It's extraordinary. Choose a DieHard battery for your Mercury Mountaineer and drive with confidence knowing that your battery will perform when you need it. That’s why you should choose batteries from Firestone Complete Auto Care.

After Buying 2003 Mercury Mountaineer Battery

Got a new car battery installed in your 2003 Mercury Mountaineer? 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, cutting back on unnecessary short trips, keeping your battery posts clean, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your Mountaineer Car Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have battery questions that are Mercury Mountaineer-specific, visit your nearest store. Our expert techs have the answers you need.

Why doesn’t my Mountaineer battery stay charged? A car battery that needs to be jump-started every time is as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop by for a free battery test at your favorite Firestone Complete Auto Care and get a handle on your car battery’s health.
What do you do with my dead Mountaineer battery? We recycle it, taking care of both your car and the Earth.
How much will replacing my Mercury Mountaineer’s battery cost if I get a DieHard battery? Mercury Mountaineer 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? A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.
Why is there white, flaky stuff around my Mountaineer’s battery post? The white, crusty stuff that can accumulate around Mountaineer 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 clean corrosion off my Mountaineer vehicle 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 Mountaineer owner’s manual for instructions on how to do so.
Where can I purchase Mountaineer batteries near me? Your local Firestone Complete Auto Care sells and installs Mountaineer batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.