The SRS is virtually maintenancefree and there are no parts you can safely service by yourself. If the SRS air bag warning light does not illuminate when the ignition switch is in the ON position, or continuously remains on, have your vehicle immediately inspected by an authorized HYUNDAI dealer.
Any work on the SRS system, such as removing, installing, repairing, or any work on the steering wheel, the front passenger's panel, front seats and roof rails must be performed by an authorized HYUNDAI dealer. Improper handling of the SRS system may result in serious personal injury.
WARNING
To reduce the risk of serious injury or death, take the following precautions:
Additional Safety PrecautionsHyundai Elantra AD (2016-2020) Service Manual: Smart Key Unit Repair procedures
Removal
Smart Key Unit
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box.
(Refer to Body - "Glove Box Upper Cover Assembly")
3.
Remove the smart key unit (A) after disconnecting the connectors (B) and loosening the bolt and nut.
Interior 1 Antenna
...
Hyundai Elantra AD (2016-2020) Owners Manual: Sensor to Detect Distance to the Vehicle Ahead
The Smart Cruise Control uses a sensor to detect distance to the vehicle ahead.
If the sensor is covered with dirt or other foreign matter, the vehicle to vehicle
distance control may not operate correctly.
Always keep the sensor clean.
Warning message
Smart Cruise Control disabled. Radar ...