This week on The Best of Car Talk, a simple timing-belt question triggers an existential crisis as Kimberly’s disagreement with her mom leads Ray to wonder why he has a co-host. Elsewhere, Veronica’s husband wants to buy a vintage Land Rover to navigate the wilds of downtown Boston; Reed fears towing his wife’s horse trailer will destroy his beloved Bronco; and Joe’s about to get some very bad news about his Saab’s transmission. Also, meet our friends Eddie and Edie Electron and find out why they’re responsible for Michele’s starting problem. All this and more, this week on The Best of Car Talk.