BMW F31 318d N47N Front Spring Strut Suspension Leg Brake Disc Left N/S 6874378

BMW F31 318d N47N Front Spring Strut Suspension Leg Brake Disc Left N/S is a complete, used front suspension assembly designed for the front left side of the BMW 3 Series F31 318d model with the N47N engine. The set combines the suspension strut, steering knuckle, and brake disc in one configuration, which facilitates service and speeds up the replacement of the entire module. This is a practical solution for workshops and users looking for a well-fitted, original component from the Shock absorbers and struts category.

Specifications and technical data

• SKU: 6874378-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6874378
• Substitutable numbers: 31316874378, 6874378, 31316791555, 6791555, 31316866115, 6866115
• Weight: 150
• Location on the vehicle: Front, Left
• Category: Shocks, Struts & Assemblies

Application and function in the chassis system

The presented suspension strut with shock absorber, steering knuckle, and brake disc operates on the front left corner of the vehicle, responsible for wheel guidance, vibration damping, and driving stability. Integrating several sub-assemblies into one module reduces the risk of geometry issues and makes it easier to maintain the factory handling parameters characteristic of BMW. The component is dedicated to a specific body version and powertrain, which promotes precise fitment without the need for modifications.

Set construction and assembly benefits

The assembly includes a suspension strut with a shock absorber, steering knuckle, and brake disc, which allows for the replacement of the entire module instead of individual components. This solution:

• simplifies the assembly process in workshop conditions,
• reduces the time required for disassembly and reassembly of individual elements,
• makes it easier to maintain the structural consistency of the suspension system,
• promotes the maintenance of proper wheel alignment relative to the body.

Thanks to this, the set is particularly attractive for post-accident repairs or when replacing worn suspension components in a single service cycle.

Product characteristics and fitment

The element comes from the BMW range, which means compliance with the brand's factory design standards. Using an original suspension strut with a shock absorber and steering knuckle allows for maintaining predictable vehicle behavior during braking, cornering, and driving over uneven surfaces. The product is intended for operation on the front left axle, and its weight has been selected for durability and compatibility with other chassis components.

Condition, origin, and operational aspects

The offered assembly is used, which makes it a cost-effective solution while maintaining the original design specification. Choosing such a component allows for reducing repair costs while maintaining the proper fit for the specific BMW F31 318d model. Using a complete suspension strut with a shock absorber, steering knuckle, and brake disc promotes consistent system operation and facilitates technical condition checks during installation.

Technical support and additional materials

To better understand the role of the shock absorber, steering knuckle, and other elements in the chassis system, it is worth consulting a guide describing the operating principles and symptoms of wear for these components – they are discussed in detail in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers. It allows for conscious service planning and selecting the right components for a specific model.

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 suspension struts, complete columns, or individual legs, check the available parts in the BMW shock absorbers and struts category.

In the context of economical and conscious repair, it is also worth considering the impact of used components on the environment and your budget – this is described in more detail in the article Circular economy in your garage – how choosing used parts from dismantling really supports environmental protection and your wallet?, which shows how properly selected dismantled elements can work effectively in a new car.