All Opel Astra models are equipped with a front seat belt pretensioner designed to eliminate any gap in the seat belt tension in a frontal collision, thereby reducing the severity of the consequences for occupants.
The tensioner is activated in the event of a frontal collision when the negative acceleration (slowdown) six times or more the acceleration due to gravity. A lesser impact, including a rear impact, will not trigger it.
After the system is activated, a pre-compressed spring tensions the seat belt with a cable, covering the driver or passenger in the car. In this case, the movement of the belt can be up to 80 mm.
For safety reasons, any work on the belt tensioner should be entrusted to specialists (pic. 11.40).
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