Hyundai Sonata: 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. Pry open the rear cover of the smart key.

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

3. 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 the battery according to your local law(s) and regulation(s).

Smart key precautions
The smart key will not work if any of the following occur: The smart key is close to a radio transmitter such as a radio station or an airport which can interfere with normal operation of the tran ...

Immobilizer System
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. When the ignition switch is placed in the ON posit ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Engine Mounting Components and Components Location
Components 1. Transaxle mounting bracket2. Roll road bracket3. Engine mounting bracket4. Engine mounting support bracket ...

Hyundai Sonata LF 2014-2019 Service Manual: Specifications
Specifications ItemsSpecificationRated voltageDC 12VOperating voltage9V ~ 16VOperating speed30?/h ~ 250?/hSensible distance70m (Sedan)Curvature radiusStart : More than 125m/30km/hStop : Less than 125mFrequency24 GHzNumbers2EA (Master 1EA, Slave 1EA) ...

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