One problem related to steering gear box has been reported for the 1998 Mercury Marquis. The most recently reported issues are listed below.
Steering wheel locked up while driving at 3-5 mph. Vehicle towed to a dealer, and informed consumer that steering gear box had to be replaced. Repairs made under warranty.
| Steering Idler Arm problems | |
| Steering Gear Box problems | |
| Hydraulic Power Assist Steering System problems | |
| Steering problems |