Long-term failure to replace the damping rubber of the shock absorber may cause the following problems:

1. Decreasing damping effect: As time goes by, the damping rubber of the shock absorber will lose its original elasticity and damping performance due to aging and hardening, which will lead to the reduction of damping effect, increase the bumpiness of the vehicle during driving, and affect the driving comfort and stability

2. Increased vibration transmission: After the rubber of the shock absorber loses its elasticity, it can't effectively absorb and reduce the impact and vibration when the vehicle is running, resulting in increased vibration transmission, aggravating the wear and damage of vehicle parts and affecting the overall performance and safety of the vehicle.

3. Increased tire wear: After the cushioning rubber of the shock absorber loses its cushioning effect, the impact force on the vehicle when driving will increase, which will lead to increased friction between the tire and the ground, resulting in increased tire wear and shortening the service life of the tire.