You’re cruising through the streets of Ontario, the sun dipping behind the San Bernardino mountains, when suddenly—your INFINITI starts making a noise that sounds suspiciously like a helicopter hovering overhead. It’s loud, unsettling, and definitely not the smooth, luxurious ride you’re used to. So what’s going on? That chopper-like sound could be a sign of anything from a loose exhaust component to worn-out brakes — but whatever the cause, it’s a noise you shouldn’t ignore.