As a normal everyday driver, it is not easy to recognize a decrepit or defective damper. It doesn't just stand out like a battery, deteriorating damper performance occurs insidiously.
Here are 2x3 points to check:
1) Does the body vibrate, e.g. is there rocking and deflection when braking or in corners?
2) Does the car take every pothole, every bump? Is he restless afterwards?
3) Is the vehicle sensitive to side winds? What about steering wheel wobble?
1) Are the tires worn unevenly?
2) Do you see more oil on the shock absorbers than the normal oil film (self-lubrication is ok)?
3) Can you already see defective bump stops or protective tubes?
If a defect is already visible, then it's time! Change! Right away! Always in pairs per axle, even if only the right or left is broken!
You can't just go by the year of manufacture of the vehicle. Driving style, type of use and frequency have a strong influence on the condition of the chassis. If you are unsure, it is better to ask a specialist whether a damper replacement is necessary. Think about your safety! And as you know: quality shock absorbers at fair prices are available from us, on-site installation workshops.