On each wheel, you’ll find the wheel hub assembly between the drive axle and the brake drums or discs. On the brake disc side, the wheel is attached to the bolts of the wheel hub assembly. While on the side of the drive axle, the hub assembly is mounted to the steering knuckle either as a bolt-on or press-in assembly. To see the wheel hub assembly, you’ll need to remove the wheel and then remove the brake caliper and brake rotor. On most late-model vehicles manufactured since 1998, there is a wheel hub assembly in each wheel. When the assembly goes bad, it is removed and replaced with a new assembly. On cars made before 1997, front wheel drive cars use wheel hub assemblies at each wheel and rear wheel drive vehicles use two individual bearings and seals in both front wheels. Unlike a wheel hub assembly, bearings can be serviced.
