The back window stay assembly should first require a proper rear wiper motor assembly installation using a centering jig to preserve the correct wipe angle. To replace the back window stay bolt you should clean the threaded body surface with a non-residue solvent followed by bolt installation with a torque force of 22 Nm (224 kgf-cm, 16 ft-lbf). The threads of reusable bolts require Toyota Genuine Adhesive 1324 or Three Bond 1324 or another equivalent before installation. It is essential to avoid handling the piston rod during back window stay assembly installation and to forego wearing cotton gloves. The installation starts with attaching the two stop rings to the assembly while double-checking the hood support assembly is properly placed within the ball joint. Start by removing the back window upper trim panel assembly followed by easing out the back door trim cover LH (without power back door) then the back door service hole cover LH (with power back door), the power back door rod detachment (with power back door) and continue by taking out both the back door trim cover RH, back door lock cover (for glass hatch type), assist strap hole cover, assist strap assembly, and back door trim panel assembly. The following components need removal for the task: rear wiper shaft cover alongside rear wiper arm head cap and rear wiper arm and blade assembly, then the rear wiper link cap, wiper link pivot and motor assembly (for glass hatch type). Put the rear wiper motor assembly together with the rear wiper link pivot and rear wiper link cap before adding the rear wiper arm and blade assembly and rear wiper arm head cap and rear wiper shaft cover in the end. Close the process by following these steps: Advance by putting in the back door trim panel assembly then the assist strap assembly, assist strap hole cover, back door lock cover (when utilizing glass hatch type), back door trim cover LH (both with and without power back door), connect the power back door rod (if using power back door), fix the back door service hole cover LH (additionally for power back door), back door trim cover RH and back window upper trim panel assembly.