What does a vacuum pump do in a car?

The vacuum pump is part of the braking system, and it ensures there's a vacuum in the booster at all times. This in turn helps maintain a consistent level of braking force when pressing down the pedal.

What are the symptoms of a bad vacuum pump?

Symptoms of a faulty vacuum pump include:

- Reduced braking performance
- Oil leaks beneath the engine
- Poor fuel efficiency/fuel top-ups don't last as long