Nissan Quest 2004 Rattling Sound Under Car

“I have a Nissan Quest 2004, after it drives through rough/bumpy roads surface it makes a rattling noise underneath the car.Nissan claims that’s the way it was design to handle bumpy roads.Please i would like to know your opinion.”

Of course, nothing should rattle under the vehicle. Any good mechanic could drive the car, then put it on their lift and be able to figure out what’s making the rattling. Common rattles come from worn torsion bar bushings (VERY common), loose or broken exhaust system hangers, catalytic converters that have internally broken substrata (which means nothing as they work fine but will rattle), and loose or broken body parts like plastic inner fender moldings. AND, let’s be logical, I assume the vehicle now makes a rattling sound that it didn’t used to make. If that is the case, then it is not a “normal” sound.