BMW 1 SERIES E87 120i N46 Front Left N/S Spring Strut Brake Suspension Leg Hub

BMW 1 SERIES E87 120i N46 Front Left N/S Spring Strut Brake Suspension Leg Hub is a complete front suspension component designed for wheel alignment and steering on the driver's side. The set combines vibration damping functions with precise mounting of the hub and chassis components, which translates into stable handling and predictable vehicle behavior. This solution is particularly beneficial for post-accident repairs, replacing worn-out suspension, or restoring the factory driving characteristics of the BMW 1 Series E87 with the N46 engine.

Specifications and technical data

• SKU: 6771557-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6771557
• Substitutable numbers: 31316786019, 6786019, 31316771557, 6771557, 31216793923, 6793923, 31216764443, 6764443, 31216765157, 6765157, 34116854997, 6854997, 34116764641, 6764641, 34116766681, 6766681
• Location on the vehicle: Front, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension

The presented element belongs to the Suspension replacement kits group and is responsible for wheel guidance and controlling the operation of the spring and other suspension components on the left side of the front axle. Integrating the shock absorber with the steering knuckle facilitates maintaining correct geometry, reduces play, and improves the rigidity of connections at a critical point of the structure.

The placement on the vehicle on the front left side allows for direct replacement of a damaged or worn-out assembly without the need to match different parts separately. This allows for faster restoration of proper vehicle handling, reduces vehicle pulling during braking, and improves ride comfort.

Benefits of using an original BMW assembly

The original BMW component ensures factory fitment for the front suspension structure of the E87 120i model with the N46 unit. This means compliance with the manufacturer's intended performance characteristics, appropriate mounting rigidity, and compatibility with standard brake and steering system components.

Choosing a complete shock absorber–steering knuckle assembly allows you to:

• minimize the risk of wheel geometry issues after repair,
• reduce assembly time compared to replacing individual sub-assemblies,
• maintain the structural integrity of the front suspension,
• preserve the predictable, typical BMW vehicle handling.

This is particularly important in post-collision repairs, where the accuracy of fit and maintaining the alignment of elements is crucial for the safety and durability of the entire system.

Assembly characteristics and application

The shock absorber with the steering knuckle on the front left side is designed for installation in the factory mounting points of the body and suspension of the BMW 1 Series E87. The design of the assembly allows for the transfer of loads from the wheel to the body and cooperation with standard wishbones, links, and steering system components.

When replacing, it is recommended to:

• check the condition of other suspension elements on the same side,
• inspect for play in the mounts and cooperating elements,
• perform wheel geometry alignment after installation is complete.

This procedure allows you to fully utilize the potential of the assembly and ensures consistent suspension behavior in various road conditions.

Condition and advantages of choosing a used part

The offered element is in used condition, which is a reasonable compromise between the cost of repair and maintaining the manufacturer's original specification. In practice, this means the possibility of restoring proper suspension operation without the need to invest in expensive sets of new replacements with uncertain characteristics.

In the context of selecting used components for chassis repairs, it is also worth paying attention to the approach to other key sub-assemblies. A good point of reference is an article describing why, in the case of drivetrain repairs, an original dismantled part is often a better solution than expensive regeneration – this topic is discussed in more detail in the material: Manual transmission failures in cars – why is an original used part a more reasonable choice than regeneration?.

If you are also interested in the impact of using original used parts on the vehicle's later resale value, the following guide may be helpful: Original used parts and the car resale price – how not to lose money?, which discusses how conscious component selection helps maintain an attractive vehicle valuation.

Expanding suspension repair in BMW

If you are planning a comprehensive repair or upgrade of the front suspension area in your BMW and need other elements from the same group, such as shock absorbers, steering knuckles, or complete suspension strut modules, check the available parts in the BMW Suspension replacement kits category.

Selecting components from one product group allows you to maintain the consistency of suspension performance characteristics, which translates into driving stability, even tire wear, and predictable vehicle reactions during braking and cornering. Thanks to this, the BMW E87 120i can continue to offer the precision of handling typical for this brand, even after a major chassis repair.