Which front suspension component is commonly used in unibody vehicles and functions as both a spring and damper?

• A. MacPherson Strut
• B. Coilover
• C. Torsion Bar
• D. Leaf Spring

Answer: (A)

The main idea is that modern unibody front suspensions commonly use a single, compact unit that both supports the vehicle and provides springing and damping. The MacPherson strut fits this role: it combines a coil spring and a shock absorber into one upright assembly that connects the wheel hub to the vehicle body. The spring cushions impacts, while the damper controls motion, keeping the wheel in contact with the road and stabilizing the ride. Because the strut also serves as a structural element and connection point for steering, it’s well-suited to the compact, integrated design used on most unibody cars.

A coilover is still a spring-and-damper arrangement, but it’s a more specialized, often adjustable setup used in performance or aftermarket applications, not the standard front suspension on most unibody vehicles. A torsion bar provides spring force through twisting but doesn’t inherently combine a damper in the same unit. A leaf spring is an older, multi-leaf spring arrangement, typically not used for front unibody suspensions in modern cars. So the MacPherson strut best fits the description of a front suspension component commonly used in unibody vehicles that acts as both a spring and damper.