Q: How to install the rear spoiler sub-assembly and back door trim upper panel assembly on Scion xD?
A: To install the rear spoiler sub-assembly, first place 4 new gaskets, engage 2 clips, and secure the spoiler with 4 bolts at 9.0 Nm. Then, install hole plugs. Use the same procedure for the back door side garnish on both sides, and finish with the back door trim upper panel assembly.