It is time to replace the lower suspension arm in the presence of the following signs: uneven wear of the treads and strong vibration of the car while driving. Replacement of this element may vary from vehicle to vehicle. For example, removing the suspension arm may look like this: the ball joint is removed, the upper suspension arm is separated from the steering knuckle, the stabilizer attachments to the upper suspension arm are removed, the internal hinge bolt in the engine compartment is removed, and finally the upper suspension arm of the car is removed. The element is replaced with a new suspension arm. In order to replace the lower suspension arm, remove the front wheel, the mounts fixing the lower arm to the subframe, and the entire lower arm assembly. Install a new suspension arm.