The balljoint in the 
Radius Arm is not serviceable in Integra models; if it wears or breaks, the whole radius arm must be replaced. The two balljoints of the Legend models' front suspension. The upper arm also has a non removable upper balljoint. That upper balljoint, which is worn or damaged, will require replacement. A lower balljoint, inside the 
Steering Knuckle, is removable but needs special tools; and the knuckle-if worn or damaged-should be removed because it must be replaced at dealer service department or another repair shop.