That's a GM platform car:

https://en.wikipedia.org/wiki/GM2900_platform

GM already had 50% controlling share of Saab way back in 1989 and by 2010 they were wholely owned by GM.

I had a 1998 Saab 93 (2L petrol LPT) and was initially disappointed to find out it used the same platform as the Vauxhall/Opel Vectra. That said it still had those distinct Saab design touches and was pretty damned good in the snow and ice.

Even the 900NG which the 9-3 derives from was a GM2900 platform car.