One problem related to windshield wiper/washer motor has been reported for the 1998 Mercury Grand Marquis. The most recently reported issues are listed below.
Windshield wiper motor is noisy. Windshield wipers are scraping windshield. Mechanic inspected motor, and said it needed to be replaced.
| Windshield Wiper/washer Motor problems | |
| Side/rear Glass problems | |
| Windshield problems | |
| Interior Rearview Mirror problems |