BMW 3 E91 LCI Touring 320d N47N Rear Right O/S Suspension Leg Wheel Brake Disc

BMW 3 E91 LCI Touring 320d N47N Rear Right O/S Suspension Leg Wheel Brake Disc is a complete, used rear suspension part designed for the right side of the axle in the BMW 3 Series E91 LCI model with the N47N engine. This component serves as a key mounting point for the wheel hub, control arms, and braking system, ensuring stable wheel handling and correct suspension geometry. By maintaining the factory OEM design, the fitment to the body and chassis remains consistent with the manufacturer's standards.

Specifications and technical data

• SKU: 6783654-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6783654
• Substitutable numbers: 33326783654, 6783654, 33217547076, 7547076, 34216768698, 6768698, 34216855007, 6855007, 34216764651, 6764651, 33217533446, 7533446
• Location on the vehicle: Rear, Right
• Category: Suspension Component Replacement Kits

Purpose and function in BMW suspension

The rear steering knuckle with the suspension leg and hub in the BMW E91 LCI is responsible for precise wheel guidance and transferring loads from the body to the tire. As a structural element of the rear suspension, it works in conjunction with the control arms, spring, shock absorber, and braking system, maintaining the proper camber and toe angles of the wheel. The vehicle placement, specified as rear right, allows for clear identification of the installation side and reduces the risk of errors when selecting parts.

Set construction and benefits of a complete replacement

Combining the steering knuckle, suspension leg, and hub into one assembly simplifies the service process – the mechanic removes and installs the entire unit as a single module, without the need to fit individual components separately. This configuration:

• facilitates maintaining the correct suspension geometry after repair,
• reduces the number of potential points for play and knocking,
• speeds up installation in workshop conditions,
• decreases the risk of incorrect system assembly.

For the user, this means more predictable vehicle handling, stability during braking, and better repeatability of alignment settings after visiting a geometry station.

Selecting a used steering knuckle for the BMW E91 LCI

When replacing suspension components in the BMW 3 Series E91 LCI, it is essential to match the part to the specific body version and drive axle. The offered rear right steering knuckle is designed for the N47N engine configuration, which ensures compatibility with the factory chassis design. The product comes from the Suspension replacement kits group, making it well-suited for comprehensive post-collision repairs, replacing corroded elements, or restoring factory handling parameters after modifications.

As a used part, it retains the original geometry and mounting points, which is particularly important in vehicles where road behavior repeatability and compatibility with stock control arms and brakes are prioritized.

Practical installation and maintenance tips

Before installation, it is recommended to check the condition of the cooperating suspension elements – bushings, control arms, bearings, and shock absorber mounts. Replacing the rear right steering knuckle is a good time to:

• check for play in other points of the rear axle suspension,
• verify the condition of the brake disc and caliper,
• inspect brake lines and ABS sensors,
• perform a geometry alignment after completing the work.

This approach helps minimize the need for re-disassembly in the near future and helps maintain stable, predictable BMW handling in daily use.

Suspension service expansion and additional materials

If you are planning a comprehensive repair or upgrade of the suspension area in your BMW and need other elements from the same group, such as control arms, springs, or shock absorbers, check the available parts in the BMW suspension replacement kits category.

When deciding to use used parts in the chassis, it is worth familiarizing yourself with the differences between the standard and sports configurations, as well as practical tips for component selection. A detailed comparison can be found in the article Standard vs. sports suspension – design differences and is it worth buying used suspension parts?, which discusses the construction, parameters, and examples of applications in the context of real-world repairs.