The 2009 Acura TSX uses a standard 12-volt lead-acid automotive battery. It is not an AGM (absorbent glass mat) battery by default.
The exact battery size and specifications can vary by market and trim, but all units rely on a conventional flooded 12V battery located in the engine bay. When replacing, you should match the original voltage, battery type, and cold-cranking amps (CCA) as printed on the battery label or in the owner's manual.
Battery type and specifications
Below are the core facts to understand about the TSX battery, serving as a quick reference when shopping or inspecting the car.
- Voltage: 12 volts
- Chemistry: Flooded lead-acid (conventional) battery
- Type: Standard automotive battery (not typically AGM for this model year)
- Group size: Varies by market and configuration; verify on the current battery label or in the owner's manual
When replacing, ensure the new battery matches the original group size and CCA rating to maintain starting performance and fitment.
How to identify the correct replacement
Use these steps to confirm you buy the right battery for your 2009 TSX.
- Check the battery label for the group size (e.g., numbers and letters) and CCA rating
- Consult the owner’s manual or a dealership parts department for the recommended group size
- If possible, bring the old battery or VIN when shopping at an auto parts store to ensure compatibility
By matching the original group size and CCA, you ensure proper fit, electrical performance, and reliability in start-stop or cold-weather conditions.
Maintenance considerations
Keep these maintenance tips in mind to extend the life of the TSX battery and avoid unexpected failures.
- Inspect terminals for corrosion and clean with a baking soda solution if needed
- Ensure terminal clamps are tight to the specified torque
- Check the battery’s age; most automotive batteries last 3–5 years under normal use
- Keep the engine bay clean and free of leaks that could affect the battery case
Regular checks and timely replacement help prevent electrical issues that can affect engine starting and other electrical systems.
Summary
The 2009 Acura TSX relies on a conventional 12-volt flooded lead-acid battery, located in the engine bay. Replacement should mirror the original group size and CCA rating, which can vary by market and trim. Always verify with the battery label or the owner's manual, and follow standard maintenance practices to maximize longevity.