The trunk module can fail causing the tailgate to malfunction when opening or closing.Google+
Car Problem Reports
Saab 9-7x Tailgate Malfunctions Opening or Closing
Saab 9-7x Problem
Average Mileage: 68,871 mi (45,000 mi - 113,500 mi)
Visitor, 2007 Saab 9-7x, 48,500 mi
Rear hatch stopped opening including the rear hatch window. Painful as it malfunctioned when I was arriving back from vacation with my family at the airport. No fix yet.
Visitor, 2008 Saab 9-7x, 50,000 mi
Tailgate just stopped opening, window still opened. Took in for a taillight out & repair shopped somehow got the tailgate to open and then the window didn't open....2 months now gone by and neither opening now. Not fixed yet.
Visitor, 2007 Saab 9-7x, 79,845 mi
PROBLEM OPENING REAR WINDOW.BUTTON DOES NOT SEEM TO WORK AT TIMES.
Tailgate does not open sometimes. When needing it to open the liftgate does not become unlatched even though you can hear it unlatching. Does not happen all the time.
Not fixed yet. The rear lift glass does not seem to be affected.
Visitor, 2007 Saab 9-7x, 45,000 mi
Rear gate hatch will not open. Hoping to find a solution.
Visitor, 2008 Saab 9-7x, 80,000 mi
Same as others no fix. eventually opens
Increasingly the tailgate began to stick until it became almost impossible to open. No solution as yet.