BMW 1 Series E87 LCI 123d N47S Front Left N/S Spring Strut Brake Suspension Leg

BMW 1 Series E87 LCI 123d N47S Front Left N/S Spring Strut Brake Suspension Leg is a complete front suspension assembly for the left side, designed for BMW 1 Series E87 models. The set combines a shock absorber, steering knuckle, and brake caliper in one configuration, which facilitates servicing and allows for efficient, technically correct replacement within the running gear. It is a practical solution for workshops and users who expect a well-fitted component for the front axle.

Specifications and technical data

• SKU: 6771557-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6771557
• Substitutable numbers: 31316786019, 6786019, 31216793923, 6793923, 34116776527, 6776527, 34116854999, 6854999, 31316771557, 6771557, 31216764443, 6764443, 34116772017, 6772017, 34116764645, 6764645
• Location on the vehicle: Front, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension system

The presented item belongs to the Suspension replacement kits category and is designed to operate on the front, left side of the vehicle. In one assembly, you receive key components responsible for wheel guidance, vibration damping, and interaction with the braking system. Such a combination reduces the risk of incorrect selection of individual parts and makes it easier to maintain proper suspension geometry.

The placement on the vehicle has been precisely defined as front – left side, which is important both for selection and subsequent installation. Thanks to this, the mechanic has clear information on where the set should be installed on the vehicle body.

Set components and installation benefits

The BMW 1 Series E87 LCI 123d N47S Front Left N/S Spring Strut Brake Suspension Leg includes components that are often replaced simultaneously in workshop practice. Using a complete assembly allows you to:

• reduce the time required for disassembly and installation of individual parts,
• limit the number of potential mismatch points between the shock absorber, steering knuckle, and caliper,
• maintain the structural consistency of the front suspension on the left side.

Such a solution is particularly beneficial for post-accident repairs or major interventions in the running gear, where the certainty of fit and stable wheel guidance are crucial.

Original BMW origin and part number compliance

The set comes from the BMW line, which means it was designed with the brand's factory standards in mind. The item has a dedicated OEM part number and associated interchangeable numbers, allowing it to be precisely verified for compatibility with a specific vehicle configuration. This is important both for services using VIN-based catalogs and for users checking compatibility on their own.

The presence of reference numbers also facilitates comparison with other variants used in a given model, which is significant in cases of differences resulting from, for example, engine versions or equipment levels.

Performance characteristics and service application

As an item from the Suspension replacement kits category, the product will work well for both standard maintenance and more extensive repairs. Using a complete assembly on the front left side allows you to restore proper suspension operation, improve handling stability, and ensure correct interaction with the braking system on that side of the vehicle.

This type of solution is particularly useful when the existing assembly has suffered mechanical damage or corrosion, as well as when you are looking for a consistent, technically organized approach to repairing the front axle.

Technical support and suspension component selection

To better understand the role of the shock absorber, steering knuckle, and caliper in the entire running gear system and to learn about good service practices, it is worth checking out our guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers. The article discusses the relationships between individual suspension components and helps in consciously planning repair work.

If you want to compare the cost-effectiveness of using original, replacement, and used parts in the context of repair economics and matching by OEM numbers, the following guide will also be helpful: original, replacement, or used – which car parts are the most cost-effective?.

Expanding suspension repairs for 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 additional shock absorbers, complete steering knuckles, or related mounting components, check out the available parts in the BMW suspension replacement kits category.