1
Power down and open the cargo area
Turn the car fully off and open the rear hatch. Remove the cargo floor mat and any storage trays covering the battery compartment.
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2023–2024 Toyota Prius Prime
2023-2024 Toyota Prius Prime — 12V Battery Replacement
🔧🔧 Moderate
20–30 minutes
Quick Video Tutorial
Parts You Need
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Total Cost
$0.00
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| 12V auxiliary battery (correct group size for 2023–2024 Prius Prime) | — | — |
💡 Pro tip: Order all parts at once to save on shipping
Step-by-Step Instructions
Follow these steps carefully
2
Expose the 12V battery
Remove the trim panel or cover over the 12V auxiliary battery in the cargo area. You will see a small conventional-style battery with two terminals.
3
Disconnect the negative terminal first
Loosen the 10 mm nut on the negative (-) terminal and lift the cable off. Tuck it aside so it cannot touch the battery.
4
Disconnect the positive terminal
Loosen the 10 mm nut on the positive (+) terminal. Remove the cable and tuck it aside so it cannot contact metal.
5
Remove the hold-down and old battery
Unbolt the battery hold-down bracket or strap. Lift the old battery straight out, keeping it level so no acid spills.
6
Install the new battery
Set the new battery in the tray and secure the hold-down bracket. Clean the cable ends with a wire brush if corroded.
7
Reconnect positive first, then negative
Attach the positive (+) cable and tighten its nut, then attach the negative (-) cable and tighten. Reinstall the trim cover and cargo floor.
8
Verify electrical operation
Power the car on and confirm the dashboard boots normally with no warning lights. Check that lights, locks, and accessories all work.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Disconnecting the positive terminal first, which risks a short if the wrench touches body metal.
- • Touching or disturbing the orange high-voltage cables, which carry lethal voltage.
- • Leaving the hold-down loose, which lets the battery bounce and crack its case.
More Toyota Prius Prime Repairs
2017-2022 Toyota Prius Prime — Hybrid Battery Pack Replacement
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2017-2022 Toyota Prius Prime — 12V Battery Replacement
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2017-2022 Toyota Prius Prime — Brake Pad Replacement
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2017-2022 Toyota Prius Prime — Cabin Air Filter Replacement
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2017-2022 Toyota Prius Prime — Engine Air Filter Replacement
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2017-2022 Toyota Prius Prime — Spark Plug Replacement
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