I would suspect that a sub harness in something like a steering column would be different. The main harness will most likely be the same. My logic refers to the instrument cluster itself. Each cluster will cost many hundreds of thousands (maybe even millions) of dollar to develop. Then more $$$ to qualify and validate (especially because it's a safety critical system). I design amplifiers and we write the same checks. It's much more cost effective and efficient to commonize hardware and just change software.