Hyundai Sonata: Restrictions in handling keys
When leaving keys with parking lot and valet attendants, the following procedures will ensure that your vehicle’s trunk and glove box compartment can only be opened with the master key.
Lock
When leaving the key with a parking lot attendant or valet, perform the following and leave the sub key with the attendant. The sub key can start the engine and operate door locks only.

Trunk
1. Open the trunk lid.
2. Set the trunk lid control switch to LOCK position (
).
3. Close the trunk lid.
Glove box
Close and lock the glove box using the master key.
Lock release
Trunk
1. Open the trunk lid with the master key.
2. Set the trunk lid control switch to UNLOCK position (
).
3. Close the trunk lid.
In this position the trunk will open with the trunk lid release button or transmitter. The trunk can never be opened with the sub key.
Glove box
Unlock the glove box using the mechanical key.
Key operations
(1) Master key (M)
Used to start the engine, lock and unlock the doors, lock and unlock the glove
box, and open the trunk.
(2) Sub key (S)
Used only to start the engine and lock and unlock the do ...
Immobilizer system
Your vehicle is equipped with an electronic engine immobilizer system to reduce
the risk of unauthorized vehicle use.
Your immobilizer system is comprised of a small transponder in the ignition key ...
See also:
Seat Belt Pretensioner (BPT). Description and Operation
Description
The Seat Belt Pretensioners (BPT) are installed inside Center Pillar (LH
& RH). When a vehicle crashes with a certain degree of frontal impact, the pretensioner
seat belt hel ...
Heated Oxygen Sensor (HO2S). Description and Operation
Description
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed
both upstream and downstream of the Manifold Catalytic Converter. The sensor
output voltage varies ...
Indicator symbols on the instrument cluster
Seat belt warning light
High beam indicator
Turn signal indicator
ESC indicator (ESC malfunction
indicator)
ESC OFF indicator
ABS warning light
Parking brake & Brake fluid warning
...
