One problem related to underbody shield has been reported for the 2004 Mercury Monterey. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mercury Monterey based on all problems reported for the 2004 Monterey.
While driving car, the rear of vehicle started making loud grinding noise while making right turn. Result-rear wheel wells corroded causing the 3rd row seat anchor to completely detach from the vehicle resulting in exposing the interior of vehicle and rendering the third seat unsafe to use.
| Body problems | |
| Structure problems | |
| Frame Rust problems | |
| Underbody Shield problems | |
| Tailgate problems |