They've gotten so big, and their reputation so solid that they are basically coasting on it.
Even their internal kaizen policies are failing. How else can you explain all these v6TT engine recalls? I'm sure someone should have noticed that metal shavings in the block. They used to X ray scan each block to ensure quality. how much you wanna bet they don't do that anymore?
"1UR-FSE undergoes X-ray inspection and a CT scan to ensure minimal deformation after the die-casting process. Camshafts are hollow to minimize weight."
https://en.wikipedia.org/wiki/Toyota_UR_engine