Is a Wheel Alignment Necessary After Replacing the Lower Control Arm?

[Rachel]

If there were no other 'abnormal' phenomena before the replacement (such as vehicle pulling to one side, severe tire wear, etc.), and the issues were solely caused by the control arm—like chassis noise or vehicle pulling (which can be tested after replacing the part)—then an alignment is not necessary in such cases. More details are as follows: 1. If the following phenomena existed before replacing the control arm: such as severe tire wear, vehicle pulling, or difficulty in steering control, and after replacing the part, road testing still reveals one or more of the above 'faults,' then a wheel alignment adjustment is required to ensure driving safety. 2. The so-called four-wheel alignment refers to using the average propulsion direction of the rear wheels as the alignment reference to measure and correct the related alignment angles of all four wheels. This ensures that during driving, all parts of the chassis and the tires maintain appropriate geometric relationships, allowing the driver to operate their vehicle correctly and comfortably, and extending the service life of the tires and related chassis components.