Wheel Hub Assemblies (WHAs) are integral components of a vehicle’s wheel and suspension system, directly mounting the wheel and facilitating rotation. These units typically house the wheel bearings, wheel studs, and in some designs, the ABS wheel speed sensor, integrating multiple functions into a single assembly. WHAs are located at each wheel position and transmit driving and braking torque while allowing for smooth wheel rotation. Key features include pre-installed components for simplified installation, sealed bearings to prevent contamination, and robust construction to withstand radial and axial loads. Variations exist to accommodate 2WD, 4WD, and different brake system configurations.