Recalls 1 and 3 describe the same underlying steering column separation defect (improperly welded bracket/cowl crossbar). Recalls 2 and 4 describe the same side curtain airbag diffuser detachment defect. So there are effectively two distinct issues across the 4 filings.
The 2018 Kia Sorento has 4 recalls, the most serious being a steering column that can separate from its mounting due to a faulty weld, causing the driver to lose steering control entirely.
The side curtain airbags carry a separate concern: a component inside the airbag module can break free during deployment and become a projectile inside the cabin, raising the risk of injury to occupants.