After replacing the ball joint of the pull rod, it is usually necessary to perform four-wheel alignment.

This is because the replacement of the pull rod ball joint may affect the vehicle's suspension system, causing displacement at the connection. If four-wheel alignment is not carried out, the vehicle may experience problems such as driving deviation, steering wheel misalignment, tire wear, heavy steering, and inability to automatically return. Four wheel alignment includes adjusting parameters such as caster angle, camber angle, front wheel camber angle, front wheel toe in, and rear wheel toe in to ensure good driving performance and reliability of the vehicle.

However, if other chassis components (such as shock absorbers, connecting rods, lower control arms, subframe, etc.) are not replaced during the process of replacing the tie rod ball joint, and the vehicle does not experience any abnormal conditions such as uneven wear or running, then immediate four-wheel alignment may not be necessary. However, for safety reasons, it is best to perform four-wheel alignment after replacing the rod ball joint to avoid potential risks.