Balance shaft/oil pump chain drive failure
ENGINE AND ENGINE COOLING
44 NHTSA complaints · 2008-02 → 2022-08
“THE TDI (DIESEL) ENGINE IN THE '04 & '05 NORTH AMERICAN VOLKSWAGEN PASSATS WAS EQUIPPED WITH A CHAIN DRIVEN OIL PUMP/BALANCE SHAFT MODULE. THE CHAIN TENSIONER FAILS CAUSING THE CHAIN TO SEPARATE WHICH STOPS THE OIL PUMP AND DESTROYS THE ENGINE”
“THERE IS A PROBLEM WITH THE BHW ENGINE IN MY 2005 PASSAT TDI THE BALANCE SHAFTS IN THIS ENGINE ARE DRIVEN BY A CHAIN OFF THE MOTOR, WHICH ALSO DRIVES THE OIL PUMP. THIS UNFORTUNATE DESIGN SUBJECTS THE CHAIN TO STRESSES IT CANNOT WITHSTAND”
“I HAVE A 2005 PASSAT TDI THAT HAD ITS BALANCE SHAFT MODULE AND CHAIN THAT DRIVE THE OIL PUMP FAIL AT 92,000 MILES. IT HAPPENED WHILE I WAS DRIVING ON A TWO LANE ROAD AND I HAD TO STOP THE CAR ON THE SIDE OF THE ROAD”