Transluminal placement of a stent graft in patients with an abdominal aortic aneurysm is a new endovascular technique that offers a potentially less invasive and less risky alternative to open surgery. Complications after stent graft placement are not infrequent, but in most cases secondary endovascular intervention is successful. We describe a late major leak in the aneurysmal sac caused by a distal migration of the iliac limb of a bifurcated graft. This late complication was successfully treated by covered stent placement, excluding and thrombosing completely the reformed aneurysm.