For the parts covered under GPL, yes, which includes the kernel (if it uses Linux).
If they're covered under a more permissive license (e.g. Apache, MIT) you're out of luck as these don't require redistribution of derivative work source code, only attribution.
Comments
So if my Toyota head unit has FOSS they can provide that source code to me if I ask?
For the parts covered under GPL, yes, which includes the kernel (if it uses Linux).
If they're covered under a more permissive license (e.g. Apache, MIT) you're out of luck as these don't require redistribution of derivative work source code, only attribution.