This is the only time Al's 1983 Mercury Montego Station Wagon is seen.
According to the title, the term "Rite of Passage" refers to a symbolic ceremony that someone has passed from one stage of life to another, such as with the Hebrew Bar Mitzah from transitioning childhood to manhood.
In the outtakes that were shown at the end of the episode it shows Tim Allen lifting the kilt he was wearing and flashing Patricia Richardson. It was a joke, but later Pamela Anderson who played Tim's first Tool Time Girl made accusations that Tim Allen flashed her while she was on the show.