Unlike many vehicle parts and components, shocks and struts do not have a recommended replacement schedule. Manufacturers advise that shocks and struts for passenger cars be checked every 12,000 miles, but often these important parts of a car’s suspension system can last 60,000 miles or longer before losing their performance.
Shocks and struts are designed to improve a car’s braking and cornering performance by keeping the wheels in contact with the road. More wear and tear on shocks and struts can be expected if the vehicle is driven on rough, bumpy surfaces more frequently and at high speeds. This leads to a deterioration of the damping effect that shocks and struts are designed to apply to help a vehicle handle rough surfaces more smoothly.
Most original equipment shocks and struts are designed to last about 50,000 to 60,000 miles before they begin to deteriorate. Much of this depends on how the car is handled.
Signs that a car’s shocks and struts need to be replaced include a bouncy, uncomfortable ride, excessive body sway in turns, the car's nose dipping when braking and uneven tire wear.
