BMW F30 Rear Coil Spring Axle Suspension Left Right N/O/S Set 6851930

BMW F30 Rear Coil Spring Axle Suspension Left Right N/O/S Set are a complete set of coil springs designed for the left and right sides of the rear axle. They have been specifically engineered for the BMW suspension system, ensuring consistent handling, predictable body behavior, and the maintenance of factory suspension characteristics. Thanks to the original design, the springs work seamlessly with stock shock absorbers and suspension components, which facilitates servicing and reduces the risk of incorrect part selection.

Specifications and technical data

• SKU: 6851930
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6851930
• Substitutable numbers: 6851930, 33536851930
• Location on the vehicle: Rear, Right, Left
• Category: Leaf & Coil Springs

Purpose and function in the BMW suspension

The rear axle coil spring set for the BMW F30 is responsible for maintaining the correct vehicle ride height, stabilizing the vehicle under load, and transferring forces acting on the rear axle. These components work in pairs – left and right side – which is why replacing them as a set allows for maintaining uniform deflection characteristics and correct suspension geometry.

The springs are intended for installation on the rear axle on the left and right sides, which eliminates any doubt regarding placement on the vehicle and facilitates service planning. Using a dedicated set helps avoid stiffness differences between sides, which could affect vehicle handling, especially during dynamic driving or under full load.

Construction and fitment for BMW

The springs belong to the Leaf and Coil Springs category, meaning they are an integral part of the rear axle suspension system. The construction has been developed to meet the specific requirements of the BMW F30 platform, ensuring the proper suspension performance characteristics are maintained – from initial deflection to behavior under heavier loads.

The original BMW solution ensures:

• precise fitment to the mounting seats on the rear axle,
• compatibility with stock shock absorbers and bump stops,
• consistent vehicle behavior in line with manufacturer specifications.

As a result, installation is predictable, without the need to modify other suspension components.

Benefits of using original BMW springs

Using a dedicated set of rear springs in the BMW F30 allows for restoring factory suspension parameters after damage, wear, or previous replacement with unsuitable aftermarket parts. This solution is particularly beneficial when the goal is to maintain stock ride comfort, stability at higher speeds, and predictable vehicle behavior in corners.

Key advantages include:

• consistent deflection characteristics on both sides of the axle due to set replacement,
• maintenance of the balance between comfort and suspension stiffness as designed by BMW,
• easier diagnostics and service – the mechanic works with a solution compliant with manufacturer documentation.

Condition and service application

The offered set consists of used components, which allows for economical suspension repair while maintaining the original BMW design. This type of solution is often chosen for comprehensive rear axle repairs when it is necessary to replace both springs simultaneously, and the priority is compliance with factory technical standards.

The springs are suitable for both standard maintenance replacements and for restoring a vehicle to a configuration close to stock after previous suspension modifications.

Expanding BMW suspension service

If you are planning a comprehensive repair or upgrade of the rear axle suspension area in your BMW and need other components from the same group, such as additional springs, leaf springs, or cooperating elements within the suspension system, check out the available parts in the BMW Leaf and Coil Springs category.

If you are considering a broader use of proven used parts in servicing premium cars and want to better understand how to optimally combine quality with cost control, it is worth reading the article Luxury within reach – how to service a Porsche legend using proven used parts, which demonstrates a practical approach to service using original components from dismantling.