BRAKE LINE FAILER DO TO POOR ROUTING FROM FACTORY AND SUBSTANDARD MATERIAL USED ON OEM LINES (BARE STEEL) . ALWAYS REPLACE OEM LINES WITH POWDER COATED AFTERMARKET OR STAINLESS "ONLY" INSPECT "ALL LINES & HARDWARE & CLIPS TO FRAME ECT FOR CORROSION". BRAKE FAILER OCCURED WHILE TOWING ANOTHER AUTO WITH TRAILER ATTACHED NO WARNING.