NHTSA Complaint #10446339 — 2004 BMW X3

WHILE DRIVING AT FREEZING TEMPERATURE, WHITE SMOKE CAME FROM THE ENGINE ROOM. I STOPPED THE ENGINE AND FOUND HUGE LEAK OF OIL FROM THE VALVE COVER. I NEEDED TO ADD 1 QUART OIL WHICH MEAN 1 QUART OF OIL WAS LEAKED OUT. I HAD A MECHANIC LOOK AT IT AND WAS TOLD THAT THE LEAK WAS CAUSED BY FREEZING OIL SEPARATOR. SINCE THE OIL SEPARATOR WAS DESIGNED INCORRECTLY, IT STOPS WORKING BY THE FROZEN CONDENSATE IN COLD CLIMATE. AND, IT CAUSE HIGH PRESSURE IN THE CRANKCASE AND CONSEQUENTLY OIL LEAK THROUGH THE VALVE COVER GASKET. THE PROBLEM MAY CAUSE A COMPLETE ENGINE FAILURE. *KB