The **shock absorbers** are an essential part of the vehicle's **suspension system**. Their main function is to maintain constant contact between the tires and the road, which ensures the vehicle's stability and provides comfort to the passengers. When the shock absorbers are in poor condition, the suspension system cannot function properly.

- **Symptoms of worn shock absorbers**:
- The vehicle may bounce excessively when going over bumps, as the shock absorbers are not adequately absorbing the road's irregularities.
- You may feel the vehicle swaying from side to side or leaning heavily when taking corners.
- The vehicle's lights may move up and down, indicating a suspension problem.

- **Consequences of a defective suspension system**:
- The vehicle loses stability, especially in curves or with wind.
- The risk of aquaplaning increases, and more space is needed to brake.
- Other vehicle components may wear out more quickly.

Therefore, if the vehicle's wheels bounce on bumps, it is very likely that the shock absorbers are in poor condition, as they are responsible for absorbing impacts and maintaining the vehicle's stability.