What Group Size Battery is Best for a 2012 Subaru Impreza?

When it comes to car batteries, many people wonder which group size is best for their vehicle. In the case of a 2012 Subaru Impreza, the recommended group size is Group 25.

Key Takeaways

  • The recommended group size for a 2012 Subaru Impreza is Group 25
  • A higher reserve capacity can provide longer-lasting power
  • Regular battery maintenance can extend the life of your battery

What is a Group Size Battery?

A group size battery is a standard set by the Battery Council International (BCI) to help consumers determine which battery will fit their vehicle. The size is determined by the physical dimensions of the battery, as well as its voltage and capacity.

Why is Group Size Important?

Group size is important because it ensures that the battery will fit securely into the battery tray of your vehicle. If the battery is too small, it may rattle around and become damaged. If it is too large, it may not fit at all. Additionally, the group size determines the amount of power the battery can provide, which is important for starting your vehicle.

Which Group Size is Recommended for a 2012 Subaru Impreza?

The recommended group size for a 2012 Subaru Impreza is Group 25. This group size is common among many different car models and provides enough power to start your vehicle, even in colder temperatures. Additionally, Group 25 batteries are widely available and are typically affordable.

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What About Reserve Capacity?

While group size is important, reserve capacity is another factor to consider when choosing a battery. Reserve capacity refers to the amount of time the battery can provide power without being recharged. A higher reserve capacity can provide longer-lasting power and is especially important for vehicles with a lot of accessories, such as a stereo system or GPS.

Battery Maintenance

Regular battery maintenance can also help extend the life of your battery. This includes keeping the battery clean and free of corrosion, ensuring that the connections are tight, and testing the battery regularly to ensure that it is holding a charge. If you suspect that your battery is not holding a charge, it is important to have it tested and possibly replaced.


Q: Can I use a different group size battery in my 2012 Subaru Impreza?

A: While it is possible to use a different group size battery, it is not recommended. Using a battery that is too small or too large can cause damage to your vehicle and may void your warranty.

Q: How often should I have my battery tested?

A: It is recommended to have your battery tested at least once a year, especially if your vehicle is more than three years old.

Q: How can I tell if my battery is holding a charge?

A: You can use a voltmeter to test the voltage of your battery. A fully charged battery should read around 12.6 volts.


When it comes to choosing a battery for your 2012 Subaru Impreza, Group 25 is the recommended group size. Additionally, considering the reserve capacity and regularly maintaining your battery can help ensure that it lasts as long as possible. By following these tips, you can keep your vehicle running smoothly and avoid unexpected breakdowns.

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Alton Brobst

As a longtime Subaru enthusiast, Alton brings a wealth of knowledge and experience to our blog. From his early days of tinkering with engines to his current role as a certified Subaru technician, Alton has seen it all when it comes to Subarus. When he's not working on cars, he enjoys hiking and exploring the great outdoors.

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