BMW 1 Series F21 116i N13 Rear Left N/S Leg Suspension Axle Brake Disc Hub Set

BMW 1 Series F21 116i N13 Rear Left N/S Leg Suspension Axle Brake Disc Hub Set is an original suspension component designed for the rear left side of the vehicle. Thanks to its factory geometry and design compliant with BMW standards, it ensures stable handling, predictable vehicle behavior, and proper load distribution within the suspension area. This is a solution for users who expect a technically matched component and wish to maintain the handling characteristics typical of the 1 Series F21.

Specifications and technical data

• SKU: 6873722
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6873722
• Substitutable numbers: 33526873722, 6873722, 33326792515, 6792515, 34216799461, 6799461, 34216792225, 6792225, 33526791562, 33526862172, 3352686032, 6791562, 6862172, 686032, 33207629301, 7629301, 33526860328, 6860328
• Location on the vehicle: Rear, Left
• Category: Other Steering & Suspension Parts

Purpose and function in the suspension system

The rear left steering knuckle in the BMW F21 116i with the N13 engine is responsible for the precise positioning of the wheel hub, as well as cooperation with control arms and components mounting the shock absorber and braking system. A correctly selected component in this area is crucial for:

• maintaining the proper geometry of the rear axle (toe, camber),
• vehicle stability during acceleration, braking, and cornering,
• even tire wear and the correct operation of driver assistance systems.

The element designed for the rear left side allows for maintaining the structural integrity of the entire suspension system, which translates into predictable vehicle reactions and driving comfort.

Compatibility and interchangeable numbers

The offered steering knuckle comes from the BMW parts group and complies with the manufacturer's factory standards. It has a dedicated OEM part number and a set of interchangeable numbers, which facilitates clear identification and matching to the specific configuration of the BMW 1 Series F21 116i N13. As a result, it can be safely used as a replacement in vehicles for which compatible catalog references are specified.

The presence of multiple reference numbers increases flexibility in selection for upgrades, post-accident repairs, or the replacement of worn suspension elements, while maintaining compliance with BMW service documentation.

Performance characteristics and installation

The rear left steering knuckle is a component structurally prepared to work with the standard suspension and brake components used in the BMW F21 116i. It allows for installation at factory mounting points, which limits the need for additional modifications and allows for maintaining the original force distribution in the chassis.

• dedicated vehicle placement – rear, left side,
• maintenance of factory axle geometry,
• compatibility with standard control arms, shock absorbers, and brake components.

This design approach facilitates efficient installation in workshop conditions and minimizes the risk of issues with wheel alignment after replacement.

Condition and benefits of choosing a used component

The presented steering knuckle is a used part, which allows for combining technical compatibility with an attractive repair cost. Choosing an original, used suspension component is often preferred by mechanics and users who value factory fitment and proven construction, while simultaneously wanting to reduce expenses compared to purchasing a new sub-assembly.

With proper installation and subsequent axle geometry alignment, such a steering knuckle can effectively restore the correct vehicle handling after mechanical damage, collisions, or operational wear of rear suspension elements.

System expansion and additional information

If you are planning a comprehensive repair or upgrade of the rear suspension area in your BMW and need other elements from the same group, such as control arms, hubs, or shock absorber mounts, check the available parts in the Other BMW category.

To compare the characteristics of sports suspension systems with solutions used in standard models, including differences in suspension and brake construction, it is worth reading the article describing the RS series – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.