Front air bags

Front air bags and the driver's knee air bag are designed to inflate in a frontal collision depending on the severity, speed, or angles of impact of the front collision.
Side and curtain air bags

Side and curtain air bags are designed to inflate when an impact is detected by side collision sensors depending on the severity, speed, or angles of impact resulting from a side impact collision.
Although the driver's and front passenger's air bags are designed to inflate only in frontal collisions, they also may inflate in other types of collisions if the front impact sensors detect a sufficient impact. Side and curtain air bags are designed to inflate only in side impact collisions or rollover situations, but they may inflate in other collisions if the side impact sensors detect a sufficient impact.
If the vehicle chassis is impacted by bumps or objects on unimproved roads, the air bags may deploy. Drive carefully on unimproved roads or on surfaces not designed for vehicle traffic to prevent unintended air bag deployment.
Air bag collision sensors
Air bag non-inflation conditionsHyundai Sonata LF 2014-2019 Service Manual: Water pump Components and Components Location
Components
1. Gasket2. Water pump 3. Water pump pulley
...
Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation
Description
BSD is a system that uses two magnetic wave radar sensors
attached on the rear panel to measure the distance from the following
vehicles and provides the sensing and (visual and auditory) alarm of any
vehicle coming into the blind spot.
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Blind Spot Detection (BSD) : Senses o ...