When is it necessary to perform a four-wheel alignment for a car?

[LiamLynn]

Cars must undergo a four-wheel alignment in the following situations: 1. Damage to the chassis and suspension caused by an accident; 2. When the vehicle's driving performance is affected, manifested as the vehicle pulling to one side or the steering wheel not returning to center automatically. Four-wheel alignment is based on the vehicle's four tires, adjusting the caster angle, kingpin inclination angle, camber angle, toe-in of the front wheels, and toe-in of the rear wheels to achieve a relatively balanced state among the four tires, thereby improving the vehicle's driving stability. The interval for performing a four-wheel alignment varies depending on the vehicle. For vehicles frequently driven in good road conditions, a four-wheel alignment every 30,000 to 40,000 kilometers is sufficient. However, for vehicles often driven on rough roads, the interval should be appropriately shortened, requiring a four-wheel alignment every 20,000 to 30,000 kilometers.