FAULTY BRAKE VACUUM PUMP LEADING TO REDUCED BRAKING FORCE UNDER REPEATED USE OR IN A PANNIC SITUATION LEADING TO A COLLISION. I HIT A DEER BECAUSE I WAS UNABLE STOP OR SUFFICIENTLY SLOW DOWN TO AVOID HITTING IT. I NOTICED REDUCED BRAKING FORCE AND A HARD BRAKE PEDAL. I HAVE READ OF SEVERAL REPORTS ON THE INTERNET INVOLVING THIS ISSUE