Two problems related to engine oil leaking have been reported for the 1998 Toyota Sienna. The most recently reported issues are listed below.
Vehicle did not pass vehicle emissions test, dealer said that dirty oil had leaked into the engine causing engine sludge, repairs were not covered under warranty, owner stated that the oil was changed regularly, and knew of other similar cases, onwer is concerned that this condition is a result of a manufacturing or design defect.
Vehicle did not pass vehicle emissions test, dealer said that dirty oil had leaked into the engine causing engine sludge, repairs were not covered under warranty, owner stated that the oil was changed regularly, and knew of other similar cases, onwer is concerned that this condition is a result of a manufacturing or design defect.