BMW 3 Series E90 320d LEFT FRONT SPRING STRUT LEG SUSPENSION BRAKE CALLIPER N/S

BMW 3 Series E90 320d LEFT FRONT SPRING STRUT LEG SUSPENSION BRAKE CALLIPER N/S is a complete front suspension support component, combining vibration damping with precise wheel geometry guidance. Thanks to its factory design dedicated to the BMW 3 Series E90 with the N47 engine, it ensures stable handling, precise vehicle behavior, and predictable suspension system performance. This is a practical solution for post-collision repairs or replacing a worn-out assembly on the driver's side.

Specifications and technical data

• SKU: 6771177-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 31306771177
• Substitutable numbers: 31316786001, 6786001, 31314036119 31306771177 31316767323, 4036119 6771177 6767323
• Location on the vehicle: Front, Left
• Category: Shocks, Struts & Assemblies

Purpose and vehicle placement

The presented shock absorber and steering knuckle assembly is designed for the front, left side of the vehicle, i.e., the driver's side. It is responsible for guiding the wheel, maintaining the correct camber and caster angles, and damping road surface irregularities. Using a complete assembly for this side reduces the risk of installation errors and speeds up suspension service.

Technical characteristics of the shock absorber–steering knuckle assembly

Combining the shock absorber with the strut and steering knuckle into a single assembly ensures a rigid, stable mounting for the wheel hub and the attachment points for the control arm and steering system. This configuration is particularly important in BMW-class vehicles, where handling precision, geometry repeatability, and predictable steering response are paramount. Using an original design from the Shock absorbers and struts group allows for maintaining factory suspension performance parameters.

Application in service practice

Replacing the complete shock absorber and steering knuckle assembly on the front left side is particularly beneficial in situations where mechanical damage has occurred (e.g., hitting a curb, collision) or where previous repairs have compromised the original geometry. Using a single, cohesive component:

• simplifies the assembly and disassembly process,
• reduces the number of bolted connections requiring adjustment,
• facilitates subsequent wheel alignment and suspension angle settings.

For workshops, this means shorter labor time, and for the user – a more predictable final result after the repair.

Benefits of using an original BMW component

The original design prepared by BMW guarantees compatibility with factory mounting points for the body, control arms, and steering system. As a result:

• the correct suspension geometry on the driver's side is maintained,
• the steering system operates with the appropriate force and precision,
• uneven tire wear resulting from incorrect wheel alignment angles is minimized.

This solution is highly recommended for repairs where maintaining the characteristic BMW combination of comfort and driving stability is a priority.

Condition and suitability for further use

The component comes from the secondary market, making it a sensible choice for economical suspension repairs in the BMW E90 320d N47. The used shock absorber–steering knuckle assembly allows for reduced service costs while maintaining a design consistent with the factory specifications, which is especially important in the case of post-accident repairs or restoring a vehicle for daily use.

If you are planning a comprehensive repair or upgrade of the front suspension area in your BMW and need other components from the same group, such as struts, columns, or complete shock-absorbing assemblies, check the available parts in the BMW Shock absorbers and struts category.

To better plan service work and understand the relationships between shock absorbers, control arms, and stabilizers in various models, it is worth checking out our guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers.