(1) The finishing of the internal surfaces of the cam in the power steering oil pump is not proper, and therefore, the temperature of the surfaces may increase from friction and the cam may deform, which may cause damage on the surfaces. If this problem is left unattended, the cam could break when the steering wheel is turned far to the left or right, in which case the power steering function would be lost and steering would become impossible. (2) The oil seal (for separating engine oil and power steering oil) on the drive shaft for the power steering oil pump may have moved out of the correct position, due to the inadequate processing of the grooves that are to prevent the seal from slipping out. If the seal is out of the correct position, engine oil may mix into power steering oil, which may leak from the power steering oil tank, and in the worst case, power steering oil could scatter on the exhaust pipe, resulting in a fire.