Looks like they already have been testing it in the Spartanburg, SC, USA plant (just outside of Greenville SC [also I think the largest BMW factory in the world making most of their SUVs]). Still I don't get why a humanoid robot would be a thing for car making, a robot arm seems like it'd almost always be more efficient.

Auto manufacturers have been using robots for decades to paint, weld, machine, cast, and manufacture critical automobile components and even entire chassis.

Some auto robot porn: https://www.youtube.com/shorts/Zi8EWZptTfA

The idea of humanoid looking robots shuffling around a factory floor seems like a gimmick to me.