1991 Porsche 911 Car Batteries

The Right Battery Size for a 1991 Porsche 911

Researching battery replacements for your Porsche 911? Check the chart to find the right car battery size and cold cranking amps for your 911.

Battery Engine Warranty Cold Cranking Amps
MTP-48/H6 H6/3.3L Replacement 30 months Performance 72 months 760
MTX-48/H6 H6/3.3L Replacement 36 months Performance 36 months 760
MTZ-48/H6 H6/3.3L Replacement 48 months Performance 48 months 730
MTP-48/H6 H6/3.6L Replacement 30 months Performance 72 months 760
MTX-48/H6 H6/3.6L Replacement 36 months Performance 36 months 760
MTZ-48/H6 H6/3.6L Replacement 48 months Performance 48 months 730
BATTERIES

H6/3.3L

- Battery: MTP-48/H6

- Warranty: Replacement 30 months, Performance 72 months

- Cold Cranking Amps: 760

H6/3.3L

- Battery: MTX-48/H6

- Warranty: Replacement 36 months, Performance 36 months

- Cold Cranking Amps: 760

H6/3.3L

- Battery: MTZ-48/H6

- Warranty: Replacement 48 months, Performance 48 months

- Cold Cranking Amps: 730

H6/3.6L

- Battery: MTP-48/H6

- Warranty: Replacement 30 months, Performance 72 months

- Cold Cranking Amps: 760

H6/3.6L

- Battery: MTX-48/H6

- Warranty: Replacement 36 months, Performance 36 months

- Cold Cranking Amps: 760

H6/3.6L

- Battery: MTZ-48/H6

- Warranty: Replacement 48 months, Performance 48 months

- Cold Cranking Amps: 730

Buying a Replacement Battery for Porsche 911

Sadly, your Porsche 911 won't last forever. Neither will its battery. The average car battery lasts three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Porsche 911 stranded. Look out for symptoms of a faulty car battery. A slow engine crank, 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 on its last leg.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. Our equipment can see how much charge is left in your battery. Drop in for a free battery check and, if needed, get your Porsche 911 a replacement battery. Automotive batteries are just one of our many areas of expertise. Our technicians are well-acquainted with Porsche’s service specs for 911 car batteries’ reserve capacities and cold cranking amps. Get help figuring out the battery size that matches your vehicle, and schedule an appointment today for a quick car battery replacement.

Are Interstate Batteries Good for 911s?

We know what’s best for your Porsche 911, which is why we only carry top-of-the-line replacement parts and batteries. We install more than 700,000 car batteries a year using America's #1 replacement battery from Interstate Batteries. Interstate has been a leader in car battery reliability, charge capacity, and innovation for many years. Pop the hood of any Porsche 911 and you may find a trusty Interstate Battery. Their tried and true products are commonly used in forklifts freightliners, UTVs, and fishing boats. To run optimally, your 1991 Porsche 911 requires a dependable battery. And Interstate Batteries are Outrageously Dependable®.

Caring for a New Porsche 911 Battery

Have you recently had a fresh battery installed in your Porsche 911? Congrats! 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 your battery posts clean, and not playing the radio or using other electronics when the engine is turned off.

Commonly Asked 911 Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have a battery question that's unique to your Porsche 911 battery, pay us a visit. Our expert techs have the answers you need.

  • Why won't my 911 battery stay charged? A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop by for a free battery test at your local Firestone Complete Auto Care and learn more about your battery's charge.
  • What do you do with my old 911 battery? We recycle it, taking care of both your car and the Earth.
  •  How much do Porsche 911 batteries cost? Porsche 911 batteries can be affordable, especially when there's an available battery coupon. Plus, every Interstate Battery comes with a maintenance-free performance warranty and limited-time free replacement.

Get a Battery for Your Porsche 911

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 1991 Porsche 911 today and schedule a quick installation at Firestone Complete Auto Care.