WHILE DRIVING DOOR THE HIGHWAY MY DRIVERS SIDE PASSENGER DOOR CAME OPEN WITH MY DAUGHTER IN LAW IN THE REAR SEAT AS WELL AS MY 6 MONTH OLD GRANDAUGHTER. WHEN THIS HAPPEN..THE SCREAMING AND HOLLERING FROM THE BACK SEAT CAUSED MY, THE DRIVER, TO SLAM ON BRAKES AND PULL TO THE SHOULDER HITTING A SAFETY GUARD RAIL AND DAMAGING MY REAR BUMPER. LAND ROVER REPRESENTATIVE SAID THEY COULD NOT ASSUME RESPONSIBILITY AND TOLD ME TO CONTACT MY INSURANCE COMPANY FOR REPAIR.