What could be a sign of trouble with the vehicle's suspension system?

Leaking shock absorbers are a clear indicator of trouble with a vehicle's suspension system. Shock absorbers are crucial components that help control the vehicle's handling and prevent excessive bouncing when driving over bumps or rough terrain. If they are leaking, it can result in a reduced ability to dampen shock and vibration, leading to a rough ride and decreased control, especially when cornering or braking. This can ultimately compromise safety and stability on the road.

In contrast, empty windshield washer fluid, built-up dirt on the engine, and deflated tires, while they may indicate maintenance issues, do not directly correlate with problems in the suspension system. Each of these factors affects different aspects of vehicle performance and safety. For example, empty windshield washer fluid affects visibility, built-up dirt on the engine may impact the engine's efficiency, and deflated tires can lead to traction and handling problems, but none of them relate specifically to the operation or condition of the suspension.