On 289 vehicles, the transmission parking lock may not engage. This could result in a roll-away condition, increasing the risk of a crash.
On 56 vehicles, the fuel tank may crack creating the potential for a fuel leak, fuel odor, and the Check Engine Light may come on. A fuel leak in the presence of an ignition source may result in a fire.
Vehicles commonly carrying heavy loads may experience premature rear axle bearing failure.
The wheel lug nuts on 17" wheels may loosen unexpectedly. Operating the vehicle with loose lug nuts could result in the wheel falling off.
A very small amount of 2003 Aviator models (25) are being recalled because the shift cable can become dislodged from its bracket, resulting in incorrect gear indication on the dash.