What is the primary function of a MacPherson strut in a vehicle suspension system?

The primary function of a MacPherson strut in a vehicle suspension system is to absorb shock from the road. This design integrates the shock absorber and the spring into a single unit, which not only minimizes the space required for the suspension setup but also effectively dampens road vibrations and impacts. When a vehicle encounters rough terrain or bumps, the strut compresses and extends to cushion the ride, allowing for better handling and comfort.

While the other options touch on aspects of suspension systems—that provide lateral stability, support vehicle weight, and connect wheels to the vehicle body—the MacPherson strut specifically excels in shock absorption, which is crucial for maintaining tire contact with the road and ensuring proper vehicle dynamics during driving.