Power Steering Pump
A pump that pressurizes steering fluid to assist in turning the front wheels, making steering light and effortless.
The power steering pump is the core component of a hydraulic power steering system. Its primary job is to pressurize steering fluid and route it to the steering gear or steering rack. This pressurized fluid provides hydraulic assist, making it much easier for the driver to turn the front wheels, especially at slow speeds or when parking.
The power steering pump is typically driven by the engine's accessory serpentine belt. Inside the pump, rotary vanes spin to draw fluid from the reservoir and compress it, sending it down high-pressure hoses to the steering gear. Excess fluid is returned to the reservoir via low-pressure hoses.
Power steering pumps can fail due to worn internal seals, bearing failure, or contaminated fluid. Common signs of power steering pump issues include a loud whining or groaning noise when turning the steering wheel (especially when cold), stiff or hard steering, and visible fluid leaks under the engine bay (typically a red or clear-brown fluid).
Running a power steering pump without fluid will rapidly destroy it. Regular fluid inspections and flushes prevent premature pump failure and protect the expensive steering rack.