These instructions apply to the Nissan Armada Mk1 (TA60) 2004-2015.
For other models, please choose your vehicle here.
When the Intelligent Key on your Nissan Armada (TA60, 2004–2015) starts working only up close, or a green key light blinks on the dash, its coin cell is running down. Replacing it takes a couple of minutes and one inexpensive battery.
The Warning Signs and the Battery You Need
A green Intelligent Key light blinking on the instrument panel means the key’s own battery is nearly flat. If it goes completely dead the system may not recognise the key and the engine will not start — so it is worth changing early. The Armada Intelligent Key takes a single CR2025 3-volt lithium coin cell (or equivalent).
Replacing the Cell
- Slide out the mechanical (valet) key from the fob — you use the release to help split the case.
- Ease the two halves apart at the seam with a small flat screwdriver wrapped in tape.
- Lift out the old cell, noting which face points up.
- Fit the new CR2025 the same way round, keeping fingers, dust and oil off the cell and contacts.
- Click the case back together and slide the mechanical key home.
- Press a button, or start the SUV, to confirm the key is recognised again.
If It Still Will Not Work
Check the cell is the right way up, seated firmly, and the contacts are clean. If a known-good battery still does nothing, the key may need re-syncing to the vehicle or have failed. If the key is completely dead and the Armada will not start, replacing the cell is the fix — the manual’s own remedy for a completely discharged Intelligent Key is a fresh battery.
Frequently Asked Questions
Which battery does the Armada Intelligent Key use? A CR2025 lithium coin cell, or an equivalent brand.
Do I need to reprogram the key afterwards? No — swapping the cell does not erase the programming. A genuine loss of sync is a separate re-registration step.
What does a blinking green key light mean? It warns that the Intelligent Key battery is almost flat — fit a new CR2025 before it dies completely.
Can I start the Armada with a dead key battery? A completely flat key may not be recognised. Fitting a fresh cell restores normal starting; the mechanical valet key still opens the door.
Chasing another niggle on your Nissan? Our sister site autodtcs.com covers engine trouble codes when a warning light appears.
Independent guide — not affiliated with Nissan. Always follow your official service manual and safety precautions. Read our full disclaimer.