BMW G31 Rear Axle Wheel Hub Carrier Spindle Knuckle Right O/S 6861138

BMW G31 Rear Axle Wheel Hub Carrier Spindle Knuckle Right O/S is an original suspension component designed for the rear axle on the passenger side. Its robust construction, precise hub guidance, and proper mounting points for suspension elements ensure stable vehicle handling and predictable BMW performance in daily operation.

Specifications and technical data

• SKU: 6861138
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6861138
• Substitutable numbers: 6861138, 33306861138
• Location on the vehicle: Rear, Right
• Part type: Wheel Hub
• Category: Wheel Bearings, Hubs & Seals

Purpose and vehicle placement

The rear axle knuckle on the right side is responsible for precise wheel hub positioning, as well as integration with control arms and braking system components. Its placement on the vehicle—rear, right side—guarantees a perfect fit for the BMW G31 series suspension architecture and eliminates the risk of wheel geometry issues.

This component belongs to the Wheel bearings, hubs, and bushings category, meaning it operates in direct proximity to the wheel bearing, transferring loads from the road surface to the chassis and influencing ride comfort, cornering stability, and braking efficiency.

Technical and functional characteristics

The original BMW knuckle is designed to provide:

• rigid and repeatable wheel hub mounting on the rear axle,
• proper mounting points for control arms and other suspension components,
• seamless compatibility with the factory braking system,
• maintenance of correct wheel geometry when installed properly.

Thanks to its factory design, dimensional compatibility with the original BMW suspension is maintained, which facilitates installation and subsequent wheel alignment and camber adjustment.

Condition, origin, and benefits of use

The presented knuckle is a used part, sourced from an original BMW suspension system. Choosing such a component allows for maintaining consistency with the vehicle's factory design while reducing repair costs compared to new parts.

By using an original rear axle knuckle, you gain:

• compatibility with factory suspension and brake mounting points,
• maintenance of predictable vehicle handling after the repair,
• the ability to economically replace a damaged component without interfering with the suspension structure.

If you want to better understand why used suspension components can be a sensible choice, it is worth reading the article Used car parts: Myths and facts you need to know, which dispels the most common doubts regarding such solutions.

Suspension system integration and operation

The rear right axle knuckle in the BMW G31 works in conjunction with control arms, bushings, the hub, and the wheel bearing to form a cohesive load-bearing system. A correctly selected and installed component helps maintain:

• driving stability at higher speeds,
• even tire wear,
• proper operation of driver assistance systems (e.g., traction control) that depend on wheel geometry.

For the best repair results, it is recommended to verify the suspension geometry after installation to fully utilize the potential of the BMW rear axle design.

Repair expansion and selection of related components

If you are planning a comprehensive repair or upgrade of the rear axle suspension area in your BMW and need other items from the same group, such as hubs, bearings, or bushings, check out the available parts in the BMW wheel bearings, hubs, and bushings category.

To better understand the role of individual suspension components and their impact on safety and ride comfort, the technical guide Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which discusses practical aspects of suspension operation and diagnostics, may be helpful.