These instructions apply to the Hyundai Santa Fe Mk4 (TM) 2018-2023. For other models, please choose your vehicle here.
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Disconnecting the 12 V battery on a Hyundai Santa Fe Mk4 (TM, 2018–2023) is a simple engine-bay job on the petrol and diesel versions. This guide covers safe disconnection and what to re-teach afterwards.
Where the Battery Is
The 12 V battery sits in the engine bay, behind a cover. The diesel (CRDi) and petrol Santa Fe has no high-voltage system. On the hybrid and plug-in hybrid versions there is also an orange high-voltage system — never touch it; this guide is for the 12 V battery only.
Disconnecting
- Switch the ignition off, remove the smart key and wait a minute for the electronics to sleep.
- Disconnect the negative (−) terminal first and tuck the lead aside.
- If removing the battery, disconnect the positive (+) next, then the clamp.
Reconnecting & Re-teaching
- Reconnect positive (+) first, then negative (−) last.
- Reset the clock; the radio usually reloads on its own.
- Re-initialise the one-touch windows — see our Santa Fe window guide.
- If your car has a panoramic sunroof, it may also need re-initialising.
The Santa Fe doesn’t need the battery coded.
Frequently Asked Questions
Which terminal first on the Santa Fe?
The negative (−) first, and reconnect it last.
Does the Hyundai Santa Fe battery need coding?
No — just fit it and re-teach the windows (and sunroof if fitted).
Is it safe on the hybrid version?
Yes, for the engine-bay 12 V battery. Keep clear of the orange high-voltage system.
Why won’t my windows auto-close now?
The power cut cleared their learned 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 Santa Fe Mk4 service reset.
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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