Walt’s Aztek and Skyler’s Jeep
The Aztek, purchased before the birth of Heisenberg, is a boring, safe, reliable car masquerading as a cool one.
Walter White is a baby boomer, the king of lame, and a beacon of failed dreams. The Aztek was probably purchased at the behest of Skyler, chosen for its reliability and general okayness.
Skyler picked out her Jeep again for safety: she had a palsy-ridden child to drive around. She also had no reason to look cool.
In last night’s episode Walt traded up to a muscle car, which shows his newfound confidence and the reemergence of Heisenberg (he even finds his hat in the Aztek!).