One problem related to turn signal flasher unit has been reported for the 1999 Mercury Sable. The most recently reported issues are listed below.
The turn signals will not operate when the weather is below 20 degrees, however, once the inside of the vehicle has warmed up the signals will work.
| Turn Signal Switch problems | |
| Headlights problems | |
| Turn Signal Flasher Unit problems | |
| Brake Light problems |