The Steering Knuckle connects the suspension and steering components with the front wheel assembly in a Nissan Pathfinder. The part provides attachments for upper and lower control arms or struts, tie-rod ends, and the spindle or hub that carries the wheel, allowing vertical travel of the wheel over bumps and pivoting sideways while steering. On each front corner of the Nissan, a Steering Knuckle is interposed between the wheel hub and suspension linkage. The casting of the Steering Knuckle varies depending on drivetrain layout. Rear-wheel drive versions may be fitted with either an integral spindle or a bolted hub. Conversely, front wheel or all-wheel drive Pathfinder models route the drive axle through the knuckle to a hub either fixed to or pressed into it. On the Pathfinder, each Steering Knuckle supports the wheel hub or spindle so that the tire rotates in a plane and stays in sync with suspension movement. The linkage connecting steering control with load surfaces; however, damage to stud bores or bearing contact areas can necessitate parts replacement to maintain the safety of a Nissan chassis. The Steering Knuckle assemblies on every Nissan Pathfinder help maintain handling within the suspension geometry.
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