Anti-Roll Bar
A metal bar connecting opposite wheels to reduce body roll during fast cornering or over road irregularities.
An anti-roll bar (also known as a sway bar or stabilizer bar) is a U-shaped metal bar that connects opposite wheels on the same axle to the vehicle's frame or subframe. It acts as a torsion spring, twisting to resist body roll when the vehicle corners. When the vehicle turns, the body leans, compressing the suspension on the outside wheel. The anti-roll bar transfers some of this force to the inside wheel, pulling it up and keeping the vehicle flatter through the turn.
By reducing body roll, the anti-roll bar improves cornering stability and passenger comfort. It works in conjunction with sway bar links (which connect the bar to the struts or control arms) and sway bar bushings (which mount the bar to the frame, absorbing noise and vibration).
Over time, the rubber mounting bushings can dry rot and crack, and the links can develop play in their ball joints. The most common symptom of anti-roll bar issues is a metallic clunking or rattling noise when driving over bumps or turning. Replacing worn bushings and links restores tight, quiet handling and cornering confidence.