Meanwhile, the worn Scion power steering pump parts need to be repaired or replaced for better performance. Signs of the bad power steering pump parts include: whining noise upon turning the wheel, stiff wheel, power steering fluid leak, and the wheel being slow to respond. The main components of the Scion power steering pump parts include the drive shaft, pump housing, rotor, steering box, pump cover, pressure control valve, and port for the fluid reservoir. Customers could reach our site and get performance products every day. Welcomes to a large selection of related Scion power steering pump parts available online.