Brake Light On problems of the 2014 Subaru Outback

My e-brake has not been working for the past year. The red brake light comes on at random times when parked and in motion and I cannot engage the e-brake. Subaru is saying that I need to replace the entire electronic brake mechanism for a cost of $1,000. 00 - this for a 2014 car.

On 3/22/15 while approaching a stop sign the electric parking brake locked on at 10 mph. After pulling off to the side of the road and releasing and applying the parking brake several times it finally released while the check engine and flashing brake light remained on. After shutting the vehicle off for 10 minutes the system reset to normal. The system remained normal until arriving at a Subaru dealer on 3/24/15 when the same problem occurred. The dealer took control, identified and replaced a relay and several sensors. The car performed normal until 4/1/15 when the same problem occurred while traveling 25 mph. After stopping and releasing and applying the parking brake several times the system reset but the check engine, brake and cruise control lights remained steady or flashing. After letting the vehicle set for a period of time the system reset itself. Another appointment has been made at the dealer for 4/6/15. The concern is that if the parking brake locks at high speed or in heavy traffic it could cause a serious accident.

This is the second incident where the electric parking brake light indicates the brake has been set & not released. The car was towed into dealership yesterday (5/22/2014) for same reason. Dealer stated they spoke with Subaru & were unable to find any reason for the fault. They stated computer indicated the brakes were not engaged but that this same system does disable the electronic stability control when this fault occurs. We are very concerned the vehicle is safe to drive despite the assurances of the service manager ( alex) that the vehicle is safe (no worries). The instrument light on the panel also flashes "check engine light at the same time light flashes indicating parking brake has been set & not released.