Helps to stabilize the vehicle during cornering if the vehicle turns more or less than what was intended. It also assists in maintaining traction on slippery surfaces. It does so by regulating engine output and selectively applying the brakes.
Honda Civic Owners Manual. Side Airbags
The side airbags help protect the torso and pelvis of the driver or a front
passenger
during a moderate-to-severe side impact.
Housing Locations
The side airbags are housed in the outside
edge of the driver’s and passenger’s seatbacks.
Both are marked SIDE AIRBAG.
Operation
When ...