2025–2026 Nissan Ariya
By Ray Delgado ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $120 by doing it yourself! Shop cost: $300
Quick answer: 12V Battery Replacement on a 2025–2026 Nissan Ariya is rated Easy and takes about 30-90 minutes. You'll need 2 tools for this job, and parts cost about $180. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Replacement 12-volt battery for 2025-2026 Nissan Ariya; verify group size, CCA, terminal layout, and VIN fitment | — | $180.00 | |
| Anti-corrosion terminal protectant or felt washers (optional) Optional | — | $8.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Match the group size and terminal layout stamped on your original battery's label, or check your owner's manual — never guess the fitment. A weak 12V battery causes no-start and strange warning messages even when the main pack is fully charged.
Open the hood and locate the 12V battery in the engine compartment. Put on gloves and eye protection. WARNING: never touch, cut, or open any orange high-voltage cable or component — the orange wiring carries lethal voltage and is not part of this job.
I never lay tools on top of the battery. One slip across the terminals and you're welding. I check the alternator output after a battery replacement. A weak alternator kills new batteries fast.
Check the 12V battery terminals for corrosion and make sure the hold-down bracket is secure. Photograph the terminal positions and cable routing so the replacement goes back identically.
Loosen the negative (-) cable clamp nut with a 10mm wrench and lift the clamp straight off the post, tucking it where it cannot touch a terminal. Keep tools away from any orange high-voltage wiring nearby. Never let a wrench bridge the two 12V posts.
Unbolt the hold-down bracket and lift it clear, then lift the old 12V battery straight up and out of the tray and set it on the ground. Inspect the tray for corrosion, clean it with a wire brush and baking-soda solution, and let it dry. Keep the old battery upright and away from the orange high-voltage components.
Set the new battery into the tray in the same orientation and reinstall the hold-down bracket snugly. Double-check that no tools or hardware were left near the high-voltage components before closing the hood.
Press the brake and the power button to bring the Ariya to READY and confirm the car powers up normally with no 12V or EV-system warnings. The DC-DC converter recharges the 12V battery from the main pack while the car is on, so a short drive confirms charging. Reset the clock and any lost presets. Take the old 12V battery to a parts store for recycling.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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