The steering knuckle is connected by an automotive ball joint that allows turning wheels when you turn the steering wheel. If the steering knuckle wears out, you may see:
The above signs can be visible if you pay even a little attention, and it can also save you from huge damages and costs. The average lifespan of a steering knuckle ball joint is about 90,000 kilometers. But it may wear out sooner depending on the roads’ conditions, road splashes, driving skills, etc.