What size battery is in the 2019 Toyota Avalon?
The 2019 Toyota Avalon uses a standard 12-volt automotive battery for its electrical system. In the non-hybrid version, this battery is typically a Group 35, 12-volt lead-acid unit. The Avalon Hybrid also relies on a 12-volt battery for accessories and starting, but includes a high-voltage traction battery pack for propulsion. Exact sizes can vary by market and trim, so check the battery label or the owner's manual to confirm.
Non-hybrid Avalon: 12-volt battery
Before the list, note the key details that apply to the gasoline-powered Avalon’s 12-volt system. The information below helps identify the correct replacement.
- Battery type: 12-volt lead-acid (sealed, maintenance-free in most trims)
- Group size: typically Group 35
- Voltage when healthy: about 12.6 volts
- Location: engine bay, usually on the front passenger side
- Typical replacement interval: roughly every 3–5 years depending on climate and usage
Conclusion: When replacing, confirm the exact Group size shown on the battery label or in the owner's manual; auto parts stores can verify it quickly.
Avalon Hybrid: 12-volt battery and high-voltage pack
Before the list, this section distinguishes the hybrid’s two energy systems: a conventional 12-volt battery for low-voltage electronics, and a high-voltage traction battery used for propulsion.
- 12-volt battery: typically a 12V lead-acid unit (often Group 35) for accessories and starting
- High-voltage traction battery: a separate NiMH pack used by the hybrid system for propulsion
- High-voltage system voltage: nominally around 244–245 volts (NiMH) in many Toyota hybrids
- Location for the 12V battery: usually under the hood in most markets
Conclusion: In the Avalon Hybrid, the 12V battery size aligns with the conventional system, but the high-voltage pack is a distinct component and is serviced differently from the 12V battery.
How to verify the correct size and replace safely
Before replacing any battery, check the label on the battery for the exact group size (for example, Group 35) and the cold-cranking amps (CCA). Use a battery that matches or exceeds the original specifications. If you’re unsure, have a certified technician handle replacement, especially for hybrid models where high-voltage components are involved.
Summary
The 2019 Toyota Avalon uses a standard 12-volt automotive battery for the electrical system, most commonly Group 35 in the non-hybrid version. The Avalon Hybrid also uses a 12-volt battery for everyday electronics, but includes a separate high-voltage traction battery pack for propulsion. Always verify the exact group size on the battery label or in the owner's manual before purchase or replacement, and consider professional service if working near the high-voltage system on the hybrid.
