Click and Clack discuss a father’s dangerous habit of tinkering with his wife’s VW Beetle, advising the family to let him have fun but stop her from driving the car. They diagnose a mysterious howling noise in a Toyota Camrie as brake disc vibration, suggest replacing the thermostat on a Saturn SL1 with poor fuel economy, and confirm that leaving a car running at a gas station is illegal and risky. The episode also features a boat puzzle solution and advice on buying a rebuilt Subaru.