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

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

Answer: (D)

The front suspension component that combines the spring and damper in one compact unit and is widely used in unibody cars is the MacPherson strut. It integrates a coil spring and a shock absorber inside a single housing, which sits on a strut tower at the top and connects to the wheel assembly at the bottom through a lower control arm and steering knuckle. As the wheel moves, the spring absorbs vertical motion while the damper controls how quickly that motion settles, providing both support and smoothness in a single, space-efficient package. This simplicity and compactness make it ideal for unibody designs, where packaging space and manufacturing costs matter. Other options either separate the spring and damper, use a different suspension layout more common in older or heavy-duty setups, or rely on leaf springs that aren’t typical for modern unibody front suspensions.