Airbags test are in different stages; the first test is on the components to ensure it works efficiently, and the second test is to ensure deployment efficiency, including perfect timing and inflation volume. The third test stage is when the bag is inside the car seat or dashboard to ensure correct deployment in real situations. Finally, in the last test for impact analysis, there is another test done by the control units to complete the total crash and vehicle on track review. All cars must pass the safety test before going into commercial use.