2016-2019 BMW 7 Series Rear Right Steering Knuckle 621654

Also known as

Wheel Carrier

Rear Spindle

Hub Carrier

Suspension Upright

Rear Axle Carrier

What this part does

The rear steering knuckle serves as the central mounting point for the wheel hub, wheel bearing, control arms, and brake caliper on the rear suspension assembly. It maintains the precise alignment geometry of the rear wheel while allowing for necessary suspension travel. In an all-wheel-drive configuration, the center bore of this carrier accommodates the passage of the rear drive axle shaft to the hub. When a knuckle is bent or compromised, usually as a result of a severe curb strike or lateral impact, the vehicle will exhibit alignment issues that cannot be corrected with standard camber or toe adjustments, leading to accelerated tire wear and unstable handling.

Fits these vehicles

OEM and interchange numbers

621654

Before you order

Verify your exact configuration before purchasing, as rear-wheel drive and all-wheel drive (xDrive) variants utilize entirely different rear wheel carriers to accommodate the axle shafts. Because this part is typically replaced following a physical impact, thoroughly inspect all mating control arms and suspension links for hidden stress fractures or bent bushings. It is standard practice to press a brand new wheel bearing into the replacement knuckle prior to installation, as removing the old hub often damages the existing bearing.