What is a Power Steering Pump?
The pump that makes turning the wheel feel light, even when parking.
Simplified animation — not to scale.
In plain English
On hydraulic power steering systems, the power steering pump is a small engine-driven pump that pressurises fluid in the steering rack. That pressure does most of the muscle work when you turn the wheel — without it, parking a car would feel like wrestling.
"Like a power-assist on an electric bike — you still steer, but the pump does the heavy pushing."
How it works
Driven by the serpentine belt, the pump pushes hydraulic fluid (usually red or amber) through hoses to the steering rack. When you turn the wheel, valves in the rack direct that pressure to either side, helping the wheels turn with very little effort from you. Many modern cars have replaced this with electric power steering — no pump, just an electric motor.
Signs of trouble
- ⚠Heavy steering, especially at low speed
- ⚠Whining or groaning that gets louder when turning
- ⚠Red/amber fluid leaks under the front of the car
- ⚠Foamy or low fluid in the reservoir
- ⚠Steering wheel vibrating at idle
£280–£600 fitted
Always get a written quote. Prices vary by car, region, and parts brand.