Struts and Shock Absorbers: What You Need to Know

A shock is a suspension component that controls the up-and-down motion of a vehicle's wheels. Though the devices provide some shock absorption, the job of absorbing shocks is actually handled mostly by the springs. More accurately referred to as dampers, shocks reduce excessive motion, keeping the vehicle's body from bouncing down the road.

A strut is a type of shock absorber that has a structural role in a vehicle's suspension; it is mounted inside coil springs on strut-type suspensions. The strut includes a shock absorber element, but it also serves to position the wheels, a task handled by control arms in a conventional suspension design that employs dedicated shock absorbers.

How do I know it's time to replace my struts/shock absorbers?
If your car bounces like it's on a pogo stick or bottoms out over railroad tracks, it's probably because of worn shock absorbers or struts. Worn shocks also can allow excessive body lean, and they can leak the fluid that helps reduce bouncing. They also can be damaged by hitting potholes or road debris. Mounting hardware and bushings also can wear, allowing excessive suspension movement, vibrations or noises.

How often should I replace my struts/shock absorbers?
Companies that make shock absorbers used to recommend they be replaced every 50,000 miles, but in most cases that's unnecessary. Shocks and struts often last the life of a vehicle. They should be replaced if they develop leaks, become physically damaged or allow excessive bouncing on wavy surfaces and over railroad tracks. A qualified mechanic should inspect the entire suspension system when those symptoms appear, as other components might be at least partially at fault. New shocks or struts won't cure all ride and handling issues.

Why do I need to change my struts/shock absorbers?
You might not need to: Shock absorbers and struts often last the life of a vehicle. See above for signs that you might need to get them replaced. If you have any doubts, have your mechanic investigate.

How much should I pay?
The cost of repairs can depend on where you are as much as it does on what you need fixed. To get an estimate for your repair, go to our estimator, plug in your car's year, make and model information, add your ZIP code, and choose the repair you need. We'll give you a range for what your repairs should cost in your area.