Probably an accident, but assembly lines are often optimized. I know that my old Isuzu trooper had wiring for heated seats. I just had to install a button to ac

Probably an accident, but assembly lines are often optimized. I know that my old Isuzu trooper had wiring for heated seats. I just had to install a button to activate it and get a seat from the junkyard to hook in. It really depends on how a manufacturer does it but in some cases, it's cheaper to install the part and just deactivate it if the user doesn't purchase it instead of tooling two different lines in the factory