In a MacPherson strut front suspension, how many lower ball joints are present?

In a MacPherson strut front suspension, there is typically one lower ball joint per wheel. Therefore, since there are two wheels at the front of the vehicle, the total number of lower ball joints in this suspension type would generally be two.

The MacPherson strut design features a strut assembly that includes a shock absorber and a spring, providing support for the vehicle weight while also allowing for vertical wheel travel. Each wheel is connected to the lower control arm by a lower ball joint, which allows for movement during suspension travel. Thus, having two lower ball joints corresponds directly to the two front wheels equipped with this type of suspension.

When considering the other options, the reasoning is clear: one lower ball joint would not suffice for both sides of the front suspension, while three or four lower ball joints exceed the typical configuration for a MacPherson strut system, which standardizes around one ball joint per wheel.