What adjustment is typically checked when a vehicle has excessive camber?

When a vehicle exhibits excessive camber, the adjustment that is typically checked is the upper control arm placement. Camber refers to the tilt of the wheels in relation to the vertical axis of the vehicle; when there is excessive positive or negative camber, it can lead to uneven tire wear and adversely affect handling.

The upper control arm plays a crucial role in determining the camber angle. If the upper control arm's placement is incorrect or if it has been damaged or altered, it can cause the camber to be out of specification. Adjustments to the upper control arm can help restore the proper camber angle, improving both tire contact with the road surface and overall vehicle stability.

In contrast, while toe adjustment may influence tire wear, it does not directly correct camber issues, as toe refers to the direction the wheels are pointed relative to the centerline of the vehicle. Steering rack alignment is primarily concerned with the alignment of the steering mechanism and does not affect camber angles. Torsion bar adjustment relates to ride height and suspension stiffness, but not directly to camber angle. Therefore, the focus should remain on the upper control arm when addressing excessive camber.