Electric seatbelt pre-tensioners share deployment time with which safety system?

• A. Airbags
• B. ABS
• C. Engine Control Unit
• D. Transmission

Answer: (A)

In a crash, the restraint systems are coordinated to maximize protection. Electric seatbelt pretensioners and airbags are tied to the same crash sensors and airbag control unit, so when significant deceleration is detected, both deploy in a coordinated burst. The pretensioners quickly remove belt slack to hold the occupant firmly in the correct position, while the airbags begin to cushion impact. This synchronized timing helps prevent the occupant from moving forward too far and reduces the risk of injury from the belt or contact with a deploying airbag. ABS, engine control units, and transmissions operate on different functions and aren’t tied to the same crash-triggered deployment timing.