BMW 1 Series E87 116i N45 Front Left N/S Spring Strut Brake Suspension Leg Hub

BMW E87 116i N45 Front Left Strut and Knuckle Assembly is a complete front suspension component designed for installation on the left side of the front axle. Thanks to its factory BMW design and original geometry, this assembly ensures stable handling, predictable vehicle behavior, and proper interaction with other suspension components.

Specifications and technical data

• SKU: 6771553-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 31316771553
• Substitutable numbers: 31316786017, 6786017, 31216793923, 6793923, 34116774681, 6774681, 34116854996, 6854996, 31316771553, 6771553
• Location on the vehicle: Front, Left
• Category: Suspension Component Replacement Kits

Purpose and Function in Suspension

The presented strut and knuckle assembly is dedicated to the front axle, left side. It is responsible for damping vibrations, maintaining constant tire contact with the road surface, and proper steering knuckle guidance, as well as mounting brake and steering system components. The use of a complete strut-knuckle assembly facilitates the maintenance of correct suspension geometry and minimizes the risk of incorrect wheel alignment after repair.

Benefits of Using an Original BMW Part

The original BMW design ensures:

• compatibility with factory mounting points in the body and other suspension elements,
• proper interaction with standard springs, control arms, and stabilizer bars,
• retention of the damping and handling characteristics designed by the manufacturer.

This ensures that the suspension system operates predictably, which translates to braking stability, confident cornering, and comfortable everyday driving. The part belongs to the Suspension Replacement Kits group, promoting comprehensive servicing of the front axle in a single maintenance operation.

Mounting Characteristics and Application

The strut and knuckle assembly is designed for installation on the front left side, which is crucial for maintaining correct geometry and even suspension operation. Using a complete assembly reduces the number of disassembly connections, simplifies the mechanic's work, and lowers the risk of installation errors. This is a practical solution for repairs after collisions, replacement of worn-out components, or restoring the vehicle's original driving characteristics.

Condition and Application in Service Practice

The part is offered in used condition, allowing for economical repair while maintaining the original BMW design. This type of solution is particularly beneficial for post-accident repairs when a larger number of suspension components need replacement, and maintaining the vehicle's factory specifications is a priority. Selecting the correct suspension replacement kit helps to reduce additional costs associated with matching individual parts.

Technical Support and Additional Information

To better understand the role of the strut and knuckle in the operation of the entire drivetrain and their impact on safety, it is worth reading the guide: Suspension System – A Comprehensive Guide to Struts, Control Arms, and Stabilizer Bars. The article explains the relationships between individual suspension components and helps to plan repairs consciously.

If you are planning a comprehensive repair or upgrade of the front suspension area in your BMW and need other parts from the same group, such as additional struts, complete knuckles, or related mounting subassemblies, check the available parts in the BMW Suspension Replacement Kits category.

When choosing used suspension components, a guide describing common pitfalls when buying second-hand parts may also be helpful: Buying Used Car Parts – Common Mistakes When Choosing Components for Tuning and Repairs. This will help you better assess which solutions will be most suitable for your service project.