So BYD for cars and Samsung for phones and consumer electronics more generally (from fab upwards).
In fact, I believe Samsung is the only company on the planet that can design & build a state of the art smartphone from scratch - silicon/fabrication, SoC, battery, baseband, camera sensor, memory, and display.
What other high tech vertically integrated producers exist in this group?
While I could have sworn RIM put out their own modems (which Qualcomm used to make life difficult for them, especially as the world transitioned from 3G to 4G), and did their own hardware and software, I can't currently find a source