The Hidden Ball Joint You Never Check! • In this video, we’re replacing a ball joint in a rather unusual location on a Renault Master II. This vehicle’s front suspension includes six ball joints — two on the outer control arms near the wheel, and one hidden deep inside the chassis, mounted on the upper arm beneath the coil spring, which presses against the subframe. • This design is quite unique, and the replacement process is not as complicated as it may seem. What makes it tricky is the ball j