Another angle for car companies to develop their own tech might be (claimed) competitive edge.
Not many car manufacturer would market the airbags, breaks or tires as superior. However, car makers that develop their own engine constantly brag about how efficient or powerful their cars are compared to their competitors (e.g. Mazda and their Skyactiv, Toyota and their Hybrid).
Not many car manufacturer would market the airbags, breaks or tires as superior. However, car makers that develop their own engine constantly brag about how efficient or powerful their cars are compared to their competitors (e.g. Mazda and their Skyactiv, Toyota and their Hybrid).