Holes in Air Cleaner Housing
The air cleaner filter housing on the 3.0 L 1KZ-TE Turbo Diesel 120 Series Prado engine has three small holes on the bottom of the air cleaner housing. If entering deep water such as a river crossing, the two holes will allow water to enter the air filter element and potentially allow water to be drawn into the engine.
These holes are primarily used to drain water, however in the case where the water is deep, the opposite will happen.
It would be wise to familiarize yourselves with these holes and
be prepared with rubber bungs to plug them should the need arise.
In normal driving however, the holes should be open. They are
there for a valid reason.
From inside the air box, the holes are at the lowest point of the air cleaner assembly.
For the sake of completeness, a view of the holes from underneath the air cleaner assembly.