AUTO 7 STEERING KNUCKLE, SOLD INDIVIDUALLY Steering knuckle plays a significant role on your vehicle's suspension system. It holds the wheel hub and lets the strut, lower ball joint, and outer tie rod end to link to the rest of the suspension components on your vehicle. If you want the best steering knuckle, get it from Auto 7. These are high quality, OE replacements that will give you a smooth, even, and stable ride. Passed the ISO-14000, QS-9000, and ISO/TS-16949 international safety standards, Auto 7 Steering Knuckle will surely knock all your steering troubles out.