These instructions apply to the Infiniti Q30 (H15) 2015-2019. For other models, please choose your vehicle here.
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If the key fob on your Infiniti Q30 (H15, 2015–2019) has gone weak or the central locking has become intermittent, the coin cell inside is almost certainly flat. It’s a quick swap with a CR2025.
Battery First — What You Need
- A CR2025 coin cell (3 V).
- The fob’s own mechanical key blade (used to open the case).
Replacing the Cell
- Slide the lock to the right and pull out the mechanical key.
- Press the mechanical key against the key cover and pull off the button-cell cover.
- Remove the old cell.
- Fit a new CR2025 with the positive side facing up.
- Refit the cover and the key, then check the remote locks and unlocks the car.
Lost Key or Adding a Spare
A cell swap keeps the existing coding. A lost or broken key can only be ordered and programmed by a dealer with a diagnostic tool — there’s no owner sequence.
If a Fresh Cell Doesn’t Help
- Check the orientation — the positive side faces up.
- Use the mechanical blade to unlock the door in the meantime.
- Still intermittent? A receiver fault can store a code — look it up on autodtcs.com.
Frequently Asked Questions
What battery does the Infiniti Q30 key use?
A single CR2025 (3 V) coin cell, fitted positive-side up.
Do I need to reprogram the key after the swap?
No — the coding is retained for a battery change.
Can I program a new Q30 key myself?
No — a replacement must be ordered and coded by a dealer.
How do I open the fob?
Slide the lock, remove the mechanical key, then use it to prise off the cell cover.
If the fob stopped working after a battery disconnection, see our Q30 battery disconnect/reconnect guide.
Disclaimer: The information on this page is provided for general guidance only. Always follow your official service manual and safety precautions when working on your vehicle. We are not responsible for errors, omissions, or any damage resulting from the use of this information.
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