How to Replace a Subaru Battery: Step-by-Step Installation Guide

Ever found yourself stuck with a dead car battery at the worst possible moment? Picture this: you’re running late for an important meeting, and your Subaru won’t start. Frustrating, right? Luckily, learning how to replace your Subaru battery can save you from these inconvenient situations. In this article, we’ll guide you through the simple steps to swap out your old battery for a new one.

Imagine the peace of mind knowing you can handle a dead battery on your own, without relying on expensive roadside assistance. By mastering the art of replacing your Subaru battery, you’ll gain confidence in your car maintenance skills and save time and money in the long run. So, are you ready to take control of your Subaru’s battery health and ensure smooth rides every time? Let’s dive in and equip you with the knowledge you need to tackle this task effortlessly.

Gather the necessary tools and supplies

When getting ready to replace your Subaru battery, it’s essential to have the right tools and supplies on hand. Here’s what you’ll need:

  • Tools:
  • Wrench or Socket Set: for removing battery terminals.
  • Battery Terminal Cleaner: to clean any corrosion.
  • Battery Terminal Protector: to prevent future corrosion.
  • Battery Holddown Clamp Tool: for securing the new battery in place.
  • Safety Gloves and Goggles: to protect your hands and eyes.
  • Supplies:
  • Replacement Battery: make sure it’s compatible with your Subaru model.
  • Baking Soda: for a homemade cleaning solution.
  • Water: to mix with baking soda.
  • Clean Cloth or Paper Towels: for wiping down surfaces.

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Having these tools and supplies ready will ensure a smoother battery replacement process.

Park your Subaru in a safe and flat location

When replacing your Subaru battery, start by parking your car in a safe and flat area. Make sure the engine is turned off and the parking brake is engaged before you begin the replacement process. This will ensure a stable working environment and reduce the risk of accidents.

Choose a location that is well-lit and well-ventilated to make the battery replacement process more comfortable and safer for you. Working in a cramped or dimly lit space can make it challenging to access the battery and increase the likelihood of accidents.

Avoid replacing the battery in areas with excessive moisture or extreme temperatures, as these conditions can affect the performance of the battery and make the replacement process more difficult. A dry and moderate temperature environment is ideal for a smooth battery replacement experience.

Remember to keep children and pets away from the work area to prevent any unwanted distractions or accidents. By ensuring a safe and flat location for replacing your Subaru’s battery, you set yourself up for a successful and stress-free maintenance task.

Locate the battery in your Subaru

When replacing your Subaru’s battery, you need to first locate where it’s housed. In most Subaru models, the battery can be found in the engine bay. Look for a rectangular or square-shaped box with cables attached to it.

To access the battery, you might need to remove a plastic cover or some components. Refer to your Subaru’s owner’s manual if you’re unsure about how to access the battery in your specific model.

Once you’ve identified the battery location, take note of how it’s positioned and connected. This will help you when it comes time to remove and install the new battery later on.

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Remember to disconnect the negative terminal first to avoid any electrical mishaps.

Safely remove the old battery

When it comes to safely removing the old battery from your Subaru, it’s important to follow a few key steps to ensure a smooth process. Here’s what you need to do:

  • Gather your tools: Before starting, make sure you have the necessary tools on hand, such as gloves and safety goggles.
  • Disconnect the battery: Start by removing the negative terminal first, followed by the positive terminal. This order helps prevent electrical mishaps during the removal process.
  • Secure the battery: Once the terminals are disconnected, carefully remove any mounting brackets or straps holding the battery in place.
  • Lift out the old battery: With the battery now free, lift it out of the engine bay, making sure to handle it with care. Batteries can be heavy, so be cautious during this step.
  • Inspect the battery: Take a moment to inspect the old battery for any signs of damage or wear. Proper disposal of the old battery is essential to protect the environment.

Remember, safety should always be your top priority during this process. By following these steps, you can safely remove the old battery from your Subaru and prepare for the installation of the new one.

Install the new battery correctly

  • Positioning: Place the new battery in the same orientation as the old one. Ensure the positive (+) and negative (-) terminals are correctly aligned.
  • Securing: Firmly secure the new battery in place using the hold-down clamp or bracket. Avoid loose connections that could lead to vibrations.
  • Connecting: Reattach the positive (+) cable first, followed by the negative (-) cable. Tighten the terminals securely.
  • Testing: Turn on your vehicle to test if the new battery is functioning properly. Check for any warning lights or issues.
  • Safety: Dispose of the old battery responsibly. Avoid improper disposal methods that can harm the environment.

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Fact Data
Battery Life 3-5 years
Average Cost $100-$200
Installation Time 15-30 minutes


That’s it! Replacing the battery in your Subaru is a simple and important maintenance task. Remember to follow the correct installation steps, test the new battery, and dispose of the old one responsibly. By taking care of your car’s battery, you ensure smooth starts and reliable performance. With an average lifespan of 3-5 years, a cost between $100-$200, and an installation time of just 15-30 minutes, keeping your Subaru powered up is easier than you might think. Stay proactive with your battery maintenance, and you’ll be hitting the road with confidence every time.

Frequently Asked Questions

How should I install a new battery in my Subaru?

Place the new battery in the same orientation as the old one, align the positive and negative terminals correctly, secure the battery in place firmly, and reconnect the cables in the proper order. Lastly, start the vehicle to test the new battery’s functionality.

What is the average lifespan of a car battery?

Car batteries typically last between 3 to 5 years, depending on usage and maintenance.

How much does a new car battery cost?

The cost of a new car battery usually ranges from $100 to $200, varying based on the brand and specifications.

How long does it take to install a new car battery?

Installing a new car battery usually takes between 15 to 30 minutes, depending on the vehicle and any additional complexities.

How important is it to dispose of the old battery properly?

It is crucial to dispose of the old battery responsibly to prevent environmental harm. Recycling or taking it to a designated disposal facility are recommended methods.

Battery industry professional with 5+ years of experience. Bachelor of Science in Electrical Engineering from Georgia Tech. Specializes in power systems and renewable energy.

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