A vehicle's steering feels loose, which is the most likely cause?

The feeling of looseness in a vehicle's steering is most commonly attributed to worn tie rod ends. Tie rod ends are critical components of the steering linkage that connect the steering gear to the steering knuckles. They play a crucial role in steering precision and maintain proper alignment. When tie rod ends wear out, they can create excessive play in the steering, leading to a loose or vague steering feel. This wear can result in misalignment, affecting the vehicle's handling and making it difficult for the driver to maintain control.

Other options, while they can influence vehicle handling and safety, do not typically manifest as a "loose" steering feel. For example, over-inflated tires can lead to a hard ride and reduced contact with the road, but they aren't primarily associated with loose steering. Positive camber, which can occur when wheels tilt outward at the top, could cause uneven tire wear and handling concerns, but it wouldn't directly cause a loose feeling. Sticking brake calipers primarily affect braking performance rather than steering response, and they may lead to braking issues rather than a loose steering feel.