THE VACUUM AND EGR VALVE CAUSED THE PROBLEM WITH BRAKE FAILURE. BRAKES FELT LIKE PUSHING ON A BRICK WHEN GOING DOWNHILL. WAS MAKING SQUEALING NOISES. HAD NO BRAKES. VEHICLE WENT OVER AN EMBANKMENT & FLIPPED. UPON IMPACT, AIR BAGS FAILED TO DEPLOY. DEALER INFORMED OWNER OF INTERMITTENT PROBLEMS WITH BRAKES. DRIVER HAS BACK PROBLEM DUE TO ACCIDENT. *AK