Disclosed herein is an instrument panel assembly affording for installment in a motor vehicle as one unit even though the assembly has a final width that is greater than a predetermined maximum width criterion for passing the assembly through a doorframe. The instrument panel assembly includes an instrument panel having a front side and a rear side, the front side having a temporary attachment structure and a permanent attachment structure. The assembly also includes an electronic panel with a temporary attachment structure and a permanent attachment structure, the electronic panel being operable to temporarily attach to the instrument panel in a position that affords for a reduced width of the instrument panel assembly. A process is also disclosed for installing an instrument panel assembly having an overall width that is greater than a predetermined maximum width criterion.