One problem related to brake master cylinder has been reported for the 1997 Ford Expedition. The most recently reported issues are listed below.
My wife was driving about 1/2 mile, came home and parked the truck. Within 30 minutes the truck was on fire and burned completely. Consumer put out the fire before the fire department arrived on the scene. The fire dept came out to make sure the fire was completely out, and they cut the hood open and noticed that the fire started in the master cylinder area. The truck was still sitting in front of the consumer's house.