Anti-roll bar
An anti-roll bar, also called the stabiliser or sway bar, is a torsion bar that links the left and right suspension to reduce body lean in corners.
What it means
An anti-roll bar is a spring steel rod, roughly U-shaped, that runs across the car and connects the left and right suspension. Each end joins the suspension through a short link, and the bar itself is held to the body by clamps with rubber bushings. When both wheels rise or fall together, over a flat bump, the bar simply rotates and does nothing. But when one side rises more than the other, as it does when the car leans into a corner, the bar twists and resists that difference, transferring some load to the other side and keeping the body flatter. This makes the car feel more stable and predictable through turns. The bar rarely fails, but its drop links and bushings wear out. The classic sign is a knocking or clunking noise over uneven roads, often mistaken for a worn shock absorber, when the real cause is a loose stabiliser link.
Why it matters in Singapore
Anti-roll bar links and bushings are among the most common sources of suspension knock on Singapore cars. The reason is simple: estate roads are full of speed humps, carpark ramps are short and sharp, and the tropical heat hardens and cracks the rubber over time. Many owners hear a clunk over humps and assume a major suspension fault, when the fix is often an inexpensive pair of drop links. Sorting it restores a quiet, composed ride.
How Revol Carz handles this
Revol Carz Garage traces suspension knocks methodically, checking anti-roll bar links and bushings alongside shock absorbers and control arms so the real cause is found rather than guessed. On BMW, Mercedes, Audi, and Volkswagen we replace worn stabiliser links and bushings with OEM-grade parts and confirm the noise is gone on a road test.