A vehicle has excessive negative camber on the left front, what could cause this?

Excessive negative camber on a wheel indicates that the top of the tire leans inward toward the vehicle. This misalignment can lead to uneven tire wear and affects vehicle handling. A worn left front wheel bearing can directly cause excessive negative camber on the left front tire. When the wheel bearing is worn, it can create play in the assembly, allowing the wheel to tilt improperly. This tilt can exacerbate negative camber, particularly because the left front wheel is directly affected by the condition of its bearing.

In contrast, the other options relate to components that would not affect the left front wheel's camber. For instance, worn springs on the right rear or left rear do not contribute to the camber angle of the front wheels. Similarly, a worn bearing on the right front would affect that specific wheel's alignment, not the left front. Thus, the condition of the left front wheel bearing is a crucial factor in the development of excessive negative camber in that location.