In most cases, side airbags deploy when a vehicle is struck from the side at a high speed. This could occur in situations such as a T-bone collision or a side-impact collision with another vehicle, a tree, or a stationary object. The force of the impact causes the vehicle to experience a rapid deceleration, which triggers the deployment of the side airbags.
It's important to note that the specific deployment thresholds for side airbags can vary depending on the make and model of the vehicle, as well as the specific safety systems installed. Some vehicles may have more sensitive sensors that trigger airbag deployment at lower speeds or lower deceleration rates, while others may require a more significant impact.
In general, if you are involved in a side-impact collision, it is likely that the airbags will deploy if the impact is severe enough. However, the exact circumstances and speeds involved can vary, so it is always best to consult with a qualified automotive safety expert or refer to the owner's manual for your specific vehicle for more precise information.