1. When the shock absorber is suspected to be ineffective, place the car on a flat place and press the body hard. The body can rebound no more than 2-3 times, which is normal; the up and down vibration cannot be stopped quickly, and the shock absorber is suspected to be ineffective ；
2. The shock absorber is pushed and pulled 5-8 times by hand in the upright state; (the inflated shock absorber should be automatically extended after being pushed in) to judge by the last 2-3 push and pull feelings: feel to judge the damping of the shock absorber If the force is normal, the shock absorber is normal; it is judged that the damping force of the shock absorber electric qili scooter shock absorbers factoryis abnormal (or the piston rod of the gas-filled shock absorber does not rebound), and the shock absorber fails;
3. The shock absorber has a warranty period. Different manufacturers have different regulations. They can be replaced free of charge if they are still within the warranty period.