Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Toyota SiennaBattery Location & Size
OEM battery spec from the factory service manual for the 4th Gen (2021-2024) (2021-2024).
Quick Answer
Location
Under hood, driver's side
Battery Size
Group 35
CCA Rating
550 CCA minimum
Type
AGM (stop-start equipped)
Difficulty: Easy — 15 min
Notes
- →Sienna Hybrid has a 12V auxiliary battery under the hood and high-voltage battery under the rear seat
Source: Factory service manual — 2021 Toyota Sienna 4th Gen (2021-2024).
This vehicle's factory manual
The spec is above. This opens the 2021 Toyota factory books so you can go into the Sienna procedure.
What You'll Need
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Frequently Asked Questions
- Where is the battery in a 2021 Toyota Sienna?
- The 2021 Toyota Sienna battery is located under hood, driver's side.
- What size battery does a 2021 Toyota Sienna take?
- The 2021 Toyota Sienna uses a Group 35 battery with at least 550 CCA minimum.
- How hard is it to replace the battery on a 2021 Toyota Sienna?
- Battery replacement is rated as easy — 15 min.