What type of battery does a 2016 Subaru Legacy take?
The 2016 Subaru Legacy uses a standard 12-volt automotive battery, with AGM (Absorbent Glass Mat) technology commonly specified for this era.
In detail, the exact battery type and size can vary by trim and installed features. Some Legacy models from 2016 use AGM batteries to accommodate higher electrical loads, especially if Auto Start-Stop or other power-dense options are present. To be sure, check the current battery’s label, the owner's manual, or a Subaru dealer with your VIN.
Battery Type and Replacement Considerations
Here are the core characteristics to guide replacement decisions for a 2016 Legacy battery.
- Technology: 12-volt lead-acid automotive battery, standard for most cars including the Legacy.
- AGM vs flooded: AGM is commonly preferred for Subaru models in this period to support electrical demand; if your vehicle has Start-Stop or heavy electrical load, AGM is typically recommended. If no Start-Stop, a high-quality flooded battery may be acceptable but OEM guidance often favors AGM.
- Group size and fit: The battery’s group size can be around one of Subaru’s common sizes (such as Group 35 or equivalent) but exact fit depends on trim; verify by inspecting the current battery label or the owner’s manual.
- Terminal orientation: Ensure the replacement has the same positive/negative terminal arrangement and compatible cable connections to fit the tray and harness.
Choosing a battery that matches the OEM specification helps prevent charging system warnings and ensures reliable starts across seasons. If in doubt, consult a Subaru dealer or a qualified technician and provide your VIN for precise specifications.
How to Confirm the Correct Battery for Your Vehicle
Use these verification steps to ensure you select the right unit for your specific car configuration.
- Look at the current battery label for hints like AGM designation or the exact Group Size (e.g., 35, 34R) and CCA rating.
- Consult the owner’s manual or the battery tray sticker for the recommended specification for your trim and production date; a dealer can pull VIN-specific data.
- If your Legacy has Auto Start-Stop or other high-demand systems, prefer an AGM battery to meet OEM requirements.
- Match or exceed the OEM CCA (cold-cranking amps) and reserve capacity (RC) to ensure reliable starting and electronics performance.
Bottom line: verify the exact spec from official sources and install a battery that matches or exceeds the OEM requirements for reliable performance.
Summary
The 2016 Subaru Legacy typically uses a 12-volt automotive battery, with AGM technology often recommended for this model year due to electrical demands. Always confirm the exact group size and battery type from the current battery label, the owner's manual, or a Subaru dealer using your VIN, and replace with a unit that meets or exceeds OEM specifications to maintain reliability and electronics function.
Does Subaru use a special battery?
Batteries Plus is your Subaru battery headquarters. Whether you drive an SUV like the Subaru Forester, Outback, Ascent or Crosstrek, or have a car like the Subaru Legacy or Impreza, the battery you're looking for is here, either in-store or online. Does your Subaru need a special battery to run? Not at all.
Can I replace my Subaru battery myself?
Yes, you can replace your Subaru battery yourself, as it's a task that can be done with basic tools like a 10mm wrench and by following a straightforward process of disconnecting the negative terminal first, then the positive, removing the hold-down bracket, and installing the new battery. It is important to reconnect the terminals in the reverse order (positive first, then negative).
You can watch this video to see how to replace the battery in a Subaru Outback: 1mThe Battery ShopYouTube · Oct 10, 2019
Before you begin:
- Gather your tools: You will need a 10mm wrench or socket, and potentially a long extension and a battery terminal cleaner or brush.
- Get the right battery: Make sure you have a new battery that is the correct size and amperage for your specific Subaru model.
- Safety first: Wear safety glasses and gloves. Be careful to avoid sparks by keeping the negative terminal cable away from the battery post once it's disconnected.
Step-by-step replacement:
This video demonstrates the process of replacing the battery in a Subaru Outback: 1mTRQYouTube · Aug 15, 2025
- Locate the battery: Open the hood and find the battery, usually on one side of the engine bay.
- Disconnect the negative terminal: Use your 10mm wrench to loosen and remove the nut on the negative terminal. Lift the cable off the post and set it aside where it won't touch the battery.
- Disconnect the positive terminal: Remove the protective plastic cover from the positive terminal, then loosen and remove its nut. Lift the cable off the post.
- Remove the hold-down bracket: Use the 10mm socket to unfasten and remove the bolts or nuts that secure the battery hold-down bracket. Move the bracket out of the way.
- Remove the old battery: Carefully lift the old battery straight out of the tray. Note that it can be heavy.
- Clean the tray and terminals: Before placing the new battery, clean any debris from the battery tray and clean both the battery terminals and the vehicle's cable ends with a battery terminal cleaner or brush.
- Install the new battery: Place the new battery in the tray, making sure it's seated correctly.
- Secure the battery: Reinstall the hold-down bracket and tighten its fasteners to ensure the battery won't move.
- Reconnect the terminals: Reattach the positive terminal first, then tighten its nut. Next, attach the negative terminal and tighten its nut.
- Final check: Place the protective plastic cover back over the positive terminal. Start your car to check that everything is working correctly.
Important considerations:
- Battery disposal: Take the old battery to an auto parts store or recycling center for proper disposal.
- Memory settings: You may lose some settings, such as radio presets or clock time. Some people use a "memory saver" tool that plugs into the OBD-II port or a 12v cigarette lighter to prevent this.
- Resetting the car: Your car may need to relearn its idle after the battery is replaced, which should happen automatically after a few ignition key cycles.
You can watch this video to learn how to replace the battery in a Subaru Forester: 27sMy Motor WorldYouTube · Mar 1, 2024
How much is a new battery for a Subaru Legacy?
Advance Auto Parts has 14 different Batteries for your vehicle, ready for shipping or in-store pick up. The best part is, our Subaru Legacy Batteries start from as little as $89.99.
What type of battery does a Subaru Legacy use?
The Subaru Legacy uses different battery types depending on the model year, but common BCI group sizes include Group 25 for older models (2010-2019) and Group 47 (H5) for newer models (2020-present). Modern models often use AGM (Absorbed Glass Mat) batteries for enhanced performance, while older models may have used standard flooded or Enhanced Flooded Battery (EFB) types.
Common battery types by model year
- 2020-present: Group Size 47 (H5)
- 2010-2019: Group Size 25
- Older models: May use Group Size 26 or other variations
Battery technology
- AGM (Absorbed Glass Mat): Often recommended for newer models, AGM batteries are a type of sealed lead-acid battery with high performance and vibration resistance.
- EFB (Enhanced Flooded Battery): The 2021 Subaru Legacy may use an EFB battery, which is a type of flooded battery with improved charging efficiency.
- Standard Flooded Battery: Older models may have used standard flooded batteries, which are the most common and budget-friendly option.
How to find the right battery
- Check your owner's manual: This is the most reliable way to determine the correct specifications.
- Use an online battery finder: Websites for auto parts stores allow you to enter your vehicle's make, model, and year to find compatible batteries.
- Consult your local mechanic or battery store: Experts can help you choose the right battery based on your specific needs and driving habits.
