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

Front left shock absorber with steering knuckle, hub, spring, and brake components for BMW 1 Series E87 120i N46 is a complete suspension strut assembly designed for the front axle on the driver's side. This used OEM BMW part ensures structural consistency of the drivetrain while allowing for efficient replacement of a damaged suspension assembly without the need to select individual sub-components.

Specifications and technical data

• SKU: 6786017-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6786017
• Substitutable numbers: 31316771553, 6771553, 31316786017, 6786017, 3411677468134116854997, 67746816854997, 31316771553341167681853411677302134116764641, 6771553676818567730216764641, 31216765157, 6765157
• Location on the vehicle: Front, Left
• Category: Other Steering & Suspension Parts

Application and Function in BMW 1 E87 120i N46 Suspension

The described suspension strut combines several key drivetrain elements into one part: the shock absorber, spring, steering knuckle, hub, and brake-related components. This makes it a coherent front suspension module for the BMW 1 Series E87 with an N46 engine, mounted on the front left side of the vehicle.

The placement on the vehicle, specified as front – left side, means the part directly works in the area most stressed during braking, cornering, and driving over uneven surfaces. Proper selection of such a component is important for:

• vehicle stability at higher speeds,
• steering system precision,
• even operation of the braking system on the left side,
• correct maintenance of front wheel geometry.

Complete Assembly: Strut, Brake, Hub

Combining the suspension strut with brake components and the hub in a single assembly simplifies servicing and reduces installation time. The mechanic receives a ready-to-install module that, after proper fitting to the BMW 1 E87 120i N46 model, allows for quick replacement of the damaged suspension side.

This solution is particularly beneficial in cases of mechanical damage from a collision or hitting an obstacle – replacing the complete strut with the hub and brake components minimizes the risk of leaving deformed parts in the system.

Selection, Compatibility, and Identification Parameters

The presented suspension assembly is an original BMW component, assigned to a specific body version and engine (1 Series E87 120i N46) and to a specific side of the vehicle. Manufacturer markings, OEM part numbers, and related interchangeable numbers aid in identification – all this data is collected in the technical specifications section and allows for verification of compatibility with a specific car instance.

Because the part comes from the OEM group, the factory geometry and suspension operating characteristics are maintained, which is important for both driving comfort and the durability of other drivetrain components.

Condition, Purpose, and Benefits of Installing a Used OEM Part

The suspension strut with brake and hub is offered as a used original part. This type of part is an attractive alternative to replacements of unknown origin, especially for vehicles used daily where maintaining factory handling parameters at a reasonable repair cost is important.

Choosing a complete front left suspension assembly for the BMW 1 E87 120i N46 allows you to:

• reduce the number of separately purchased components,
• decrease diagnostic and installation time,
• maintain structural consistency of the braking system and suspension on one side of the axle,
• achieve predictable vehicle behavior after repair.

More BMW Parts and Technical Knowledge

If you plan to replace other drivetrain or body-related components of this brand during repairs, and you are particularly interested in additional components mounted within the suspension, brakes, or mountings, check the available parts in the Other BMW category.

To compare the characteristics of sports drivetrain and suspension systems with solutions used in series production cars, and to better understand the differences in engine, brake, and chassis construction, the blog article Audi RS vs. Other Models – What's Under the Hood and Chassis? may be helpful, discussing key technical aspects from the perspective of informed part selection.