One can notice the failure of the power steering pump gradually, so it is very important to recognise the early signs of its failure.
Whining Noise on Full Lock
A high pitched whine or even a grinding sound when you lock the wheel is an early sign of trouble. It is worse when turning slowly such as when trying to park and in most cases is not a problem with the steering rack or column but with the steering pump.
Steering That Feels Heavy or Inconsistent
It could be that the pump is not supplying the same amount of pressure as before. This can be noticed when the steering is being turned, and it can be harder to turn than before. Also, the amount of effort needed to turn the steering can vary from time to time.
Visible Fluid Around the Pump
Low power steering fluid or power steering fluid that is dropping are signs of a problem. Check for signs of leaks from the power steering pump body and reservoir. You will see wet patches or even a faint oily residue around the area of the power steering pump. This indicates that there is slow leakage from the power steering pump seals.
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Steering Warning Light
In some models of the Polo a warning light is shown in the dashboard for the steering system. The warning light can be a complicated problem but if it appears with any of the above symptoms, it is wise to have the steering pump pressure tested rather than believing it to be a simple electrical problem.
Vibration Through the Wheel at Low Speed
A vibration through the steering wheel at low speed can also indicate that the Power Steering Pump is cavitating (drawing air into the fluid) and this will ease off at higher road speeds.
If you find more than one of the indicators listed above are occurring then it is strongly advisable to check the pump as soon as possible.
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