172 Cup
When hitting at curb the other week both my front and rear seatbelts tensioned. If I go to the scrap yard and manage to find two new seatbelt pretensioners and hook them up. Will they tension back up as soon as the car starts up? Or will they be alright? Can the rear ones be untensioned or are the same as the front and need to be replaced? Any advice would be much appreciated. Thanks.