What does a sway bar do in a suspension system?

A sway bar, also known as an anti-roll bar, plays a crucial role in enhancing the handling and stability of a vehicle during cornering. Specifically, it works by connecting the left and right sides of the suspension system, helping to minimize the body roll that occurs when a vehicle turns. By reducing the amount of lean in the vehicle’s body during turns, the sway bar promotes better tire contact with the road surface, thus improving grip and stability. This keeps the vehicle more level and predictable while navigating curves and enhances the overall driving experience.

The other options do not accurately describe the function of a sway bar. While acceleration improvements, tire pressure management, and headlight brightness can all impact vehicle performance in their respective ways, they do not relate to the sway bar's primary purpose of managing body roll and stabilizing the vehicle during turns.