Shocks and struts are two components in a vehicle's suspension system that work together to absorb bumps, vibrations, and other road imperfections. The shocks are hydraulic cylinders that dampen the movement of the suspension springs, while the struts are structural components that serve as the upper attachment point for the suspension springs and the lower attachment point for the steering knuckle.

The primary function of shocks and struts is to keep the vehicle's tires in contact with the road surface, providing a smooth ride and ensuring stable handling. When shocks and struts wear out, the suspension system becomes less effective at absorbing bumps and vibrations, leading to a rougher ride, decreased handling performance, and increased wear and tear on other suspension components.

In addition, worn shocks and struts can affect the vehicle's braking performance, causing longer stopping distances and reduced stability during sudden stops. Therefore, it is important to replace worn shocks and struts to maintain the safety and performance of your vehicle's suspension system.

The lifespan of shocks and struts can vary depending on factors such as driving conditions, vehicle usage, and maintenance habits. Generally, manufacturers recommend replacing shocks and struts every 50,000 to 100,000 miles, but it is important to check your vehicle's owner manual for specific recommendations.

It is also important to have your shocks and struts inspected regularly by a professional mechanic, especially if you notice any signs of wear such as fluid leaks, uneven tire wear, or excessive bouncing or vibrations. If you frequently drive on rough roads, carry heavy loads, or tow trailers, your shocks and struts may wear out more quickly and require more frequent replacement.

Ultimately, the best way to determine when your shocks and struts need to be replaced is to have them inspected by a qualified mechanic who can evaluate their condition and recommend any necessary repairs or replacements.