Why won’t my Cougar battery hold a charge?

A battery that won't hold a charge is almost as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the lights on overnight. Stop in for a free battery check at your local Firestone Complete Auto Care and get a handle on your car battery’s health.

What happens to my old Cougar battery?

We’ll recycle your car battery for you!

What’s the cost of DieHard batteries for Mercury Cougars?

Mercury Cougar 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 is a car battery good for?

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 substance accumulating on my Cougar’s battery post?

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

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

Where can I find a battery for my Cougar?

You can shop for Cougar 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.

1991 Mercury Cougar Batteries

Get a New Mercury Battery

Mercury Cougar Batteries Near You

Don’t let a dead battery stop you. Shop replacement car batteries for your 1991 Mercury Cougar at Firestone Complete Auto Care.

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Battery Size & Replacement for 1991 Mercury Cougar

Researching battery replacements for your Mercury Cougar? Use this chart to find the right battery size and CCAs for your Mercury Cougar.

Battery	Engine	Warranty		Cold Cranking Amps
58-2	V6/3.8L	Replacement 24 months	Performance months	550
65-2	V6/3.8L	Replacement 36 months	Performance months	850
65-AGM	V6/3.8L	Replacement 36 months	Performance months	750
65-1	V8/5.0L	Replacement 24 months	Performance months	850
65-2	V8/5.0L	Replacement 36 months	Performance months	850
65-AGM	V8/5.0L	Replacement 36 months	Performance months	750

BATTERIES
V6/3.8L - Battery: 58-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 550
V6/3.8L - Battery: 65-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 850
V6/3.8L - Battery: 65-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 750
V8/5.0L - Battery: 65-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 850
V8/5.0L - Battery: 65-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 850
V8/5.0L - Battery: 65-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 750

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Shopping for Mercury Cougar Car Batteries

Sadly, your Mercury Cougar won't last forever. Neither will its battery. On average, auto batteries last anywhere from three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Mercury Cougar stranded. Pay attention to clues that your battery is on its way out. A lagging starter, an illuminated check engine light or battery signal, bloated battery case, corroded battery posts, or weak lights can all be signs 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. Stop by for a free battery test and, if necessary, a battery replacement to help keep your 1991 Mercury Cougar running! Car batteries are one of our many specialties! Our technicians are familiar with Mercury-specific recommendations for Cougar battery CCAs 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.

Find the Right DieHard Battery for Your Cougar

We know what’s best for your Mercury Cougar, which is why we carry just that. You need a reliable, durable and powerful battery in even some of the toughest conditions. DieHard Cougar batteries surpass expectations using the latest innovative technology to meet the increasing power needs of new vehicles and their accessories. Don't call a DieHard battery ordinary. It's an extraordinary battery. Go with a DieHard battery for your Cougar and get behind the wheel with confidence. Why? Because performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

Making Your Cougar’s New Battery Last

Did you recently have a new 1991 Mercury Cougar car battery installed? Congrats! Give your new car battery the best start with proper care. Give your new battery a hand by limiting short trips, cleaning your battery posts, and not playing the radio or using other electronics when the engine is turned off.