How many kilometers should the shock absorbers of a Corolla be replaced?

[OAshley]

There is no specific replacement interval for the shock absorbers of a Corolla. Whether they need to be replaced depends on whether they are malfunctioning. The details are as follows: 1. Definition of shock absorbers: Shock absorbers are used to suppress the oscillation of the spring after absorbing shocks and the impact from the road surface. They are widely used in automobiles to accelerate the attenuation of vibrations in the frame and body, thereby improving the smoothness of the ride. When driving on uneven roads, although the shock-absorbing springs can filter out road vibrations, the springs themselves still have reciprocating motion. The shock absorber is used to suppress this spring bouncing. 2. Changes in shock absorber damping during driving: (1) During the compression stroke (when the axle and frame move closer to each other), the damping force of the shock absorber is relatively small to fully utilize the elasticity of the elastic element and cushion the impact. At this time, the elastic element plays the main role. (2) During the suspension extension stroke (when the axle and frame move away from each other), the damping force of the shock absorber should be large to quickly absorb shocks. (3) When the relative speed between the axle (or wheel) and the frame is too high, the shock absorber should automatically increase the fluid flow to keep the damping force within a certain limit, thereby avoiding excessive impact loads.