I have a 2005 BMW X5-E53. Most of the time the brake peddle is hard and works great, but every once in a while the peddle goes soft. It eventually grabs but the peddle is around 2 inches lower than usual. The person who had it before me, recently had the brakes done but they said they did not open any of the lines. Any thoughts would be appreciated.
Forgot to mention, the brake light is on as well.