These instructions apply to the Hyundai i10 Mk3 (AC3) 2020-Present. For other models, please choose your vehicle here.
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Disconnecting the 12 V battery on your Hyundai i10 Mk3 (AC3, 2020–present) — to change it or to safely work on the electrics — is a simple engine-bay job. This guide covers safe disconnection and the windows re-teach the i10 needs afterwards.
Where the Battery Is
The 12 V battery is in the engine bay, under a cover.
Disconnecting
- Make sure the ignition is off and the key is out (or smart key away from the car).
- Loosen the negative (−, black) terminal first and lift the lead clear.
- If removing the battery, loosen the positive (+, red) next, then the hold-down.
Airbag/pretensioner safety: if you’ll be near airbags or seat-belt pretensioners, wait 3 minutes after disconnecting.
Reconnecting & Re-teaching
- Reconnect positive (+) first, then negative (−) last; tighten and refit the cover.
- Reset the date/time and check the trip computer.
- Re-initialise the power windows if auto up/down drops out — see our i10 Mk3 window guide.
The i10 doesn’t need the new battery coded.
Frequently Asked Questions
Which terminal first on the i10?
Always the negative (−) first, and reconnect it last.
Does it need the battery registered?
No — just fit it and re-teach the windows.
Will I lose my radio?
No — the i10’s audio isn’t code-locked; just reset the clock.
Why won’t auto-up work afterwards?
Cutting power clears the windows’ learned top position; run the quick re-initialise.
For any warning light that stays on, look up the code on autodtcs.com. To clear the service reminder, see our i10 Mk3 service reset 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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