I have a 2013 ford edge and I was driving at 40=45 mph and when I came up to a light the brake peddle went to the floor and was very hard to stop. The result was me having to leave the road to the right to avoid a collision. I took it to ford who stated it needed a brake booster and said my vehicle doesn't qualify for an extended warranty on the booster. Car had 88k miles at time of incident.prior to the incident no lights or signs. After this I hear a loud hissing noise from under dash.