Sienna FWD V6-3.3L (3MZ-FE) (2006)
b. Install the 2 O-rings on the air conditioning tube assembly.
c. Using a hexagon wrench 4.0 mm (0.15 in.), install the air conditioning tube assembly with the 2 hexagon bolts.
Torque: 3.5 N.m (35 kgf.cm, 30 in.lbf)