BMW 4 F33 420d N47N M Sport Front Axle Left N/S Spring Strut Leg Brake Caliper

BMW 4 F33 420d N47N M Sport Front Axle Left N/S Spring Strut Leg Brake Caliper is a complete suspension unit with a brake caliper, designed for the front axle on the driver's side. Thanks to the factory M Sport specification, it ensures precise handling, consistency with the original geometry, and predictable vehicle behavior during dynamic driving.

Specifications and technical data

• SKU: 6873765
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6873765
• Substitutable numbers: 31316873765, 6873765, 31216799097, 6799097, 34116857687, 6857687, 34116792219, 6792219, 31316868661, 6868661, 34116774875, 6774875, BG
• Location on the vehicle: Front, Left
• Category: Suspension Component Replacement Kits

Application and compatibility

The offered component is intended for the BMW 4 Series F33 420d model with the N47N engine in the M Sport version, for the front left side. Integrating the spring strut with the brake caliper allows for a cohesive replacement of the entire assembly, which facilitates maintaining the proper operating characteristics of the suspension and braking system.

The vehicle placement, defined as front – left side, ensures clear identification for installation and minimizes the risk of errors when selecting parts within Suspension replacement kits.

M Sport suspension assembly construction

The M Sport spring strut in this model combines the spring and shock absorber into a single unit, working with the aluminum steering knuckle and brake caliper. This design:

• provides a stiffer suspension characteristic compared to standard versions,
• maintains stable wheel geometry at higher speeds,
• improves steering response and reduces body roll.

The integrated brake caliper is matched to the factory BMW braking system, which promotes even distribution of braking force and predictable vehicle behavior in emergency situations.

Benefits of choosing a complete suspension replacement kit

Choosing a complete front spring strut assembly with a brake caliper reduces installation time and the risk of improper assembly of individual components. In practice, this means:

• easier adaptation to the existing suspension geometry,
• consistent wear of components on one side of the vehicle,
• lower risk of unwanted noises and play after installation.

As an original BMW component from dismantling, the set retains factory performance parameters, which is particularly important in cars with a sporty character, such as M Sport versions.

Condition, verification, and preparation for installation

The item comes from legal dismantling and is offered as a used part, which allows for a significant reduction in repair costs while maintaining the original manufacturer's specification. Before being offered for sale, components of this type are standardly verified for structural integrity, the absence of mechanical damage affecting safety, and the possibility of further operation.

To maximize the durability of used suspension and braking systems, it is worth checking out practical tips regarding maintenance and operation – you will find them in the article How to extend the life of used car parts?, which describes, among other things, best practices for suspension and dismantled components.

Economy and environmental aspect

Choosing a used M Sport suspension kit for a BMW is not only a saving but also real support for the circular economy. Reusing functional components reduces waste and decreases the demand for the production of new parts, which translates into a lower environmental footprint of the repair.

If you want to better understand how conscious selection of dismantled elements – including components for N47 engine models – affects the environment and your budget, read the material Circular economy in your garage – how choosing used parts from dismantling really supports environmental protection and your wallet?.

Expanding the repair within the BMW suspension

If you are planning a comprehensive repair or upgrade of the suspension area in your BMW and need other elements from the same group, such as additional struts, springs, or related mounting components, check the available parts in the category BMW suspension replacement kits.