Erica Fernadez Boston, Massachusetts - 2002 Mercury Grand Marquis
Brakes. Got car from Dad, who's a Boston cabbie. She's hearing a hissing sound coming from the brakes, when she steps on them--noise began a month ago, after she considered trading it in for Cash For Clunkers). She thinks the car is angry at her. Guys say noise is the power brake booster leaking, needs to be replaced. Not expensive--Dad can probably find used parts for cheap.