Sienna FWD V6-3.3L (3MZ-FE) (2006)
a. Scrape off the serration part of the wiper arm with a round file or equivalent.
b. Clean the rear wiper pivot serration with a brush.
c. Stop the rear wiper motor assembly to the automatic stop position. Install the rear wiper arm to the position as shown in the illustration.
Torque: 5.5 N.m (56 kgf.cm, 49 in.lbf)
d. Install the rear wiper arm head cap.