Power steering allows you to easily turn the steering wheel in your vehicle. Without power steering pumps, the power steering system wouldn't work because the rack and pinion steering gear wouldn't receive the power steering fluid provided by the pump. Power steering pumps can sometimes leak or fail, and that's when they need to be replaced. If you see power steering fluid leaking below your car, this is one sign that the pump may have failed. Keeping your power steering system in good working order is essential for your vehicle's steering agility. If the wheel becomes difficult to turn, have the system checked.