Hyundai Elantra (CN7): Smart Key / Battery replacement

If the Smart Key is not working properly, try replacing the battery with a new one.

Battery Type: CR2032

To replace the battery:

1. Remove the mechanical key.

2. Use a slim tool to pry open the rear cover of the smart key.

3. Remove the old battery and insert the new battery. 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.

Information

An inappropriately disposed battery can be harmful to the environment and human health. Dispose of the battery according to your local law(s) or regulation.

    Loss of a smart key A maximum of two Smart Keys can be registered to a single vehicle. If you happen to lose your smart key, you should immediately take the vehicle and remaining keys to your authorized HYUNDAI dealer or tow the vehicle, if necessary.

    The immobilizer system protects your vehicle from theft. If an improperly coded key (or other device) is used, the engine’s fuel system is disabled.

    Other information:

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Mode Control Actuator

    Description and operation DescriptionThe mode control actuator is located at the heater unit.It adjusts the position of the mode door by operating the mode control actuator based on the signal of the A/C control unit. Pressing the mode select switch makes the mode control actuator shift in order of Vent → Bi-Level → Floor → Mix.

    Hyundai Elantra (CN7) 2021-2026 Service Manual: ADAS Parking ECU (ADAS_PRK)

    Components and components location Components and Components Location Repair procedures Removal    â€¢ Use a plastic panel removal tool to remove interior trim pieces without marring the surface.• Take care not to bend or scratch the trim and panels.

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