One problem related to front suspension control arm has been reported for the 2004 Jeep Wrangler. The most recently reported issues are listed below.
The driver's side lower control arm mount on our 2004 Jeep Wrangler broke off from the frame while driving. While accelerating on a city street, there was a loud bang noise from underneath the vehicle, and the Jeep became extremely difficult to control and started wandering all over the road. Upon pulling over and looking underneath the vehicle we found that there were extreme amounts of rust and corrosion inside the frame that was visible from the outside. This rust caused the entire lower control arm mount to break off from the frame. Another rot hole was found further up the frame near the transmission skidplate/cross-member assembly as well.