Actually, parts manufacturing rights was what killed Saab - brace for the off-topic:
Years ago Saab was struggling and Spyker bought them from GM, although GM still retained a lot of decision power on certain items.
When Spyker needed a cash ballin to keep Saab alive, they were approached by a Chinese consortium that would.invest heavily in the brand, BUT...
...that would have also give them the rights to manufacture parts, which were common for many GM group brands (such as Opel/Vauxhall, Pontiac, etc.)
That would drive the cost of parts out and the market would be flooded with cheaper Chinese made parts.
This was something that GM couldn't allow and hence they froze the deal and it spelled the death of Saab, something I am bitter to this day - loved my 9-3 Aero 2.8V6T, a car that I decided to purchase 3 mins into the test drive
I literally drove out of the
shop that was near to the entrance of a motorway and accelerated to merge after I quickly made it through a couple of roundabouts - by the time I was in, I was sold on the car.
Ok, back to topic