How often do shock absorbers need to be replaced?
2 Answers
Shock absorbers generally need to be replaced every 100,000-120,000 kilometers. The function of shock absorber springs: When the vehicle encounters road impacts, the springs absorb the vibration force through their own compression deformation, buffering the bumps and vibrations caused by uneven road surfaces to the car body. Then, when the impact force disappears, the springs release the absorbed energy while returning to their original shape, stretching and lengthening, thereby pushing the car upward. This phenomenon is called rebound. Rebound can make passengers feel uncomfortable and cause difficulties in vehicle control, potentially leading to dangerous situations. The function of shock absorbers: After discovering that springs alone cannot stabilize the vehicle body, automotive designers installed shock absorbers in the suspension system to prevent rebound. Without shock absorbers in the suspension, the situation would be like a vendor's handcart, where the car body keeps shaking while moving.
When it comes to shock absorbers, I drive a compact car for commuting, mostly on city roads with occasional trips on bumpy rural roads. There's no fixed rule for when to replace them—it depends on usage. Last time I asked a mechanic at the repair shop, he suggested checking them every 50,000 km. If the car bounces excessively or tires wear unevenly, it might mean the shocks are failing. My car had worn shocks after 3+ years, causing unstable steering and a floating sensation at high speeds, especially dangerous in rain. So don't wait until they fail—have them inspected during regular maintenance. Frequent rough roads shorten their lifespan, while smooth city driving helps them last longer. To save costs, monitor if the car sways. Safety comes first—worn shocks ruin handling, making emergency maneuvers risky. A new set costs a few hundred to several thousand, but quality shocks ensure years of worry-free driving.
