Expert Guide: What Battery Group Size Works Best for a 2012 Subaru Impreza?

As a car owner, it’s important to know the specifications of your vehicle, including the type and size of car battery that it requires. If you own a 2012 Subaru Impreza or are considering purchasing one, you may be wondering what battery group size is needed for optimal performance. In this article, we’ll provide you with all the information you need to know about selecting the right battery for your Impreza.

What is a Battery Group Size?

A battery group size refers to the physical dimensions of a car battery and the placement of the terminal posts. These specifications determine whether a battery will fit in your car’s battery tray and provide the correct amount of power needed to start the engine and power electrical systems.

It’s important to note that not all car batteries are created equal. While they may look similar on the outside, they can vary in size, voltage, and reserve capacity.

The Role of a Car Battery

Before we dive into which battery group size is needed for a 2012 Subaru Impreza, let’s first understand the role of a car battery. Simply put, a car battery provides the power needed to start the engine and run the electrical components of the vehicle. Without a properly functioning battery, the engine won’t start, and your car won’t move.

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Types of Car Batteries

There are different types of car batteries available in the market, including lead-acid batteries, lithium-ion batteries, and absorbed glass mat (AGM) batteries. Here’s a brief overview of each type:

  • Lead-Acid Batteries: These are the most common type of car batteries and are affordable and reliable. They have been in use for decades and are well-proven technology in automotive batteries. However, lead-acid batteries are heavier, and they need more maintenance compared to other battery types.

  • Lithium-Ion Batteries: These batteries are more expensive than lead-acid batteries and are commonly used in hybrid or electric cars. They are much lighter than other types of batteries and are environmentally friendly. They also last longer than lead-acid batteries and are maintenance-free.

  • AGM Batteries: These batteries use a special glass mat to absorb the acid electrolyte between the lead plates, making them spill-proof and maintenance-free. They can provide more power and have a longer lifespan than regular lead-acid batteries.

Battery Group Size for a 2012 Subaru Impreza

Now that we have a basic understanding of different types of car batteries let’s focus on the battery group size for a 2012 Subaru Impreza. According to the official owner’s manual, the recommended battery group size for a 2012 Subaru Impreza is group 25. This is a popular battery size used in many Japanese cars, including the Honda Civic and Toyota Corolla.

It’s important to note that a 2012 Subaru Impreza requires a 12v battery with a Cold Cranking Amps (CCA) rating of at least 410. This rating measures the number of amps a battery can produce at 0 degrees Fahrenheit for 30 seconds without dropping below 7.2 volts. The CCA rating is essential in cold weather conditions to ensure the battery has enough power to start the engine.

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Battery Maintenance

To maximize the performance and lifespan of your car battery, it’s important to follow some basic maintenance practices. Here are some tips:

  • Keep your battery terminals clean and free from corrosion.
  • Check your battery’s water level frequently, if applicable.
  • Avoid leaving your lights or electronics turned on when the engine is off.
  • Drive your car frequently to keep the battery charged.


Q. Can I use a battery with a higher CCA rating than recommended?

A. Yes, you can use a battery with a higher CCA rating than recommended for a 2012 Subaru Impreza. However, using a battery with a lower rating can lead to starting problems in extreme weather conditions.

Q. Can I use a larger battery than what is recommended?

A. No, you should only use a battery that fits the recommended battery group size for your car. Using a larger or smaller battery can lead to damage to your car’s electrical system.

Q. How long does a car battery last in a 2012 Subaru Impreza?

A. The average lifespan of a car battery is around 3-5 years. However, this can vary depending on driving habits, weather conditions and the type of battery used.


In conclusion, a 2012 Subaru Impreza requires a group 25 battery with a CCA rating of at least 410 for optimal performance. There are different types of batteries available in the market, with each having its own advantages and disadvantages. By following basic maintenance practices, you can help prolong the lifespan of your car battery and minimize the chances of starting problems.

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Davis Bellew

As a Subaru owner and enthusiast, Davis has a deep understanding of the needs and concerns of Subaru drivers. He specializes in writing informative and engaging content about Subaru maintenance and repair, and his articles are always well-researched and easy to understand. When he's not writing, he enjoys hiking and photography.

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