One problem related to emission control has been reported for the 1998 Mercury Sable. The most recently reported issues are listed below.
For years I have had electrical problems on 1998 Mercury Sable--the dome light, floor lights and door lights constantly on. I keep the dome light off. The floor light bulbs were removed. Door lights are constantly on. However, 1. 5 years ago, I lost all headlights at night upon entering a highway. I could risk using high beams by holding in place. Multifunction arm was replaced and the dial on dashboard. Then both dials were replaced for fan and heating, defrost and air conditioner. Then told my computer chip needs to be replaced. I have no defroster, heat, fan or air conditioner. Also, last year after dealing with service engine light on and off then staying on for years, had to replace the emissions sensor for car to be inspected. Would a dealer be willing to give me a defroster fix and/or heat. Many people have told me that Ford and Mercury are known for electrical problems. And over 1500 dollars later and I still have a defective, unsafe car.