What type of battery is in a Subaru WRX?
A 12-volt automotive battery is used in the Subaru WRX, and newer models commonly employ an AGM (Absorbent Glass Mat) type, while some older units may use a conventional flooded lead-acid battery.
In practice, the WRX relies on a 12-volt battery to power electronics, lights, and starting the engine. Subaru has increasingly adopted AGM batteries in recent years to meet the electrical demands of newer systems and features, but the exact type can vary by model year and market. To be certain, check the battery label or the owner's manual for your specific car.
Battery Type by Model Year
The following describes the general pattern and how to verify the battery type on your WRX across model years.
- Recent WRX models (roughly from mid-2010s to present) commonly use a 12-volt AGM battery, which is sealed and maintenance-free.
- Older WRX generations and some regional specifications may use a conventional 12-volt flooded lead-acid battery with removable vent caps.
Verifying the exact battery type for your vehicle is important to ensure you buy compatible replacements and avoid charging or sensor issues.
Replacement and Care Considerations
When replacing or maintaining the WRX’s battery, consider these guidelines to keep the electrical system reliable and safe.
- Match the OEM battery type: use AGM if your vehicle uses one; otherwise a conventional lead-acid is acceptable. Mixing types can affect charging and performance.
- Check capacity and cold-cranking amps (CCA): choose a battery with equal or higher performance than the original to handle modern electronics and startup loads.
- Proper fit and terminals: ensure the battery fits in the tray and that the terminals match the polarity and size; keep connections clean and tight.
- Professional installation recommended: Subaru’s electrical system and battery sensor can be sensitive to improper installation, so a qualified technician is wise.
- Recycling and warranty: recycle the old battery and check warranty coverage on a replacement.
By following these considerations, owners can minimize electrical issues and maintain reliable starting and system performance.
Battery location and quick tips
The 12-volt battery is generally located in the engine bay, typically toward the front of the vehicle. Access may vary by year and trim, so consult the owner’s manual or a technician if you’re planning a replacement or inspection.
Summary
In short, the Subaru WRX uses a 12-volt battery, with AGM being common in newer models and traditional flooded designs found on some older or regional variants. Always verify the exact type by checking the battery label or the owner’s manual, and replace with the correct specification to maintain optimal electrical performance.
