loud whistle from back passenger side on 2001 Jeep Cherokee

i have a 2001 jeep cherokee. Does anyone know what would be the cause of a loud whistle noise coming from the back passenger wheel area. It starts when the car is moving and is louder with higher speed.

1 answer
Inspect both of the plastic Wheel Well Liners in the rear wheel wells and make sure all the fasteners are in place. Also, if you have a luggage rack, the placement of the cross bars can create an annoying wind noise . Lastly, iif the antenna mast is not the original, if should also be suspect as sound travels.