Hyundai Tucson: Smart Key / Smart key precautions. Replacing the battery
Smart key precautions
The smart key may not work if any of the following occur:
- The smart key is close to a radio transmitter such as radio station or airport that may interfere with normal operation of the transmitter.
- The smart key is near a mobile two way radio system or a mobile phone.
- Another vehicle’s smart key is being operated close to your vehicle.
- The vehicle battery is discharged.
- Connecting an external device to the power outlet and placing the smart key near the external device.
If the smart key does not work correctly, open and close the door with the mechanical key. To start the engine, press the Button Start ignition switch directly with the smart key. If you have a problem with the smart key, contact an authorized HYUNDAI dealer.
If the smart key is in close proximity to your mobile phone, the signal could be blocked by your mobile phone’s operational signals. This is specifically relevant when the phone is active such as making and receiving calls, text messaging, and/or sending/receiving emails. If possible, avoid keeping the smart key and your mobile phone in the same location such as pants or jacket pocket to avoid interference between the two devices.
NOTICE
- Keep the smart key away from electromagnetic materials that may block electromagnetic waves to the key surface.
- Always have the smart key with you when leaving the vehicle. If the smart key is left near the vehicle, the vehicle battery may be discharged.
Replacing the battery
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Battery type: CR2032
To replace the battery:
1. Remove the mechanical key.
2. Use a slim tool or utility blade to open the cover of the smart key. Use caution not to damage the smart key.
3. Remove the old battery and insert a new one. Make sure the battery position is correct.
4. Reinstall the rear cover of the smart key.
If you suspect your smart key might have sustained some damage, or you feel your smart key is not working correctly, contact an authorized HYUNDAI dealer.
WARNING
This product contains a button battery. If swallowed, a lithium button battery can cause severe or fatal injuries within 2 hours. Keep batteries out of reach of children.
If you think batteries may have been swallowed or placed inside any part of the body, seek immediate medical attention.
Information
Always dispose batteries in accordance with local laws and regulations.
Using the mechanical key. Key cylinder (Driver door). Loss of a smart key
Using the mechanical key
If the smart key does not operate
normally, you can lock or unlock the
driver’s door by using the mechanical
key.
To remove the mechanical key from the
smart key:
...
Immobilizer System
The immobilizer system helps protect
your vehicle from theft. If an improperly
coded key (or other device) is used, the
engine’s fuel system is disabled.
When the ignition switch is in the
...
Other information:
Hyundai Tucson (NX4) 2022-2025 Owner's Manual: Remotely moving vehicle forward or
backward. Using panic alarm
Remotely moving vehicle forward or
backward (if equipped)
Some models are equipped with the
Remote Smart Parking Assist feature.
With the smart key, the vehicle can be
moved forward or backward remotely to
enter or exit a tight parking space.
For more information, refer to the
“Remot ...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Repair procedures
- Compression Pressure Inspection
• If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.
1.Start the engine until coolant temperature goes up to 80-95°C and stop the engine.
2.Remove the spark coils.(Refer to E ...
