Yes, but they are doing another layer of quality control on whatever comes out of Bosch. Because at the end of the day, they can't blame Bosch for the bad quality of cars sold under their brand.

I'd much rather have a door hinge[1] from Bosch, a company that has manufactured a billion door hinges[1], than from a company that's figuring out how to design and manufacture door hinges right now.

[1] these are hypothetical examples meant to illustrated a mechanism.