BMW F40 5W Coil Spring Set Rear Left Right N/O/S Suspension Coil Dampering

The BMW F40 Rear Spring Set is designed for the left and right sides of the rear axle, intended as an original suspension component. With precisely matched characteristics, these springs work in conjunction with shock absorbers, ensuring stable handling, predictable body behavior, and comfortable suspension operation. This solution is particularly useful when replacing worn-out parts or restoring factory driving parameters.

Specifications and technical data

• SKU: F40 5W Rear Coil Spring Set
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: F40 5W Rear Coil Spring Set
• Substitutable numbers: F40, 5W, BG
• Location on the vehicle: Rear, Right, Left
• Category: Leaf & Coil Springs

Purpose and Function in Suspension

The set of rear coil springs has been developed specifically for use on the rear axle of BMW vehicles, with a dedicated placement on the left and right sides. These components are responsible for maintaining the correct body height, transferring loads, and working with the vibration damping system, which translates to stability during acceleration, braking, and navigating uneven surfaces.

Within the suspension system, the springs act as a key load-bearing element, ensuring:

• maintenance of the rear axle's specified geometry,
• control of suspension deflection under vehicle load,
• even distribution of forces between the left and right sides.

Set Construction and BMW Compatibility

The BMW Rear Spring Set includes two elements designed for installation on both sides of the axle, allowing for simultaneous replacement and maintaining consistent suspension performance. Using parts from the Springs and Leaf Springs group dedicated to this construction facilitates maintaining the factory balance between comfort and driving precision.

The springs are prepared for installation in factory mounting points, making it possible to preserve the original suspension kinematics without the need for modifications to other components.

Performance Characteristics and Application

The presented set is intended for use as a replacement part in the rear suspension of BMW vehicles, especially in situations where existing springs show signs of material fatigue, uneven deflection, or affect the vehicle's ride height. Replacing both springs simultaneously allows for:

• restoring even support for the rear axle,
• improving stability when driving with a load,
• maintaining predictable suspension operation across the full range of suspension travel.

This product is part of BMW's original solutions, which promotes compatibility with other drivetrain components and facilitates future diagnostics and servicing.

Condition of the Part and Benefits of Choosing Original

The rear spring set is offered as a used part, providing a cost-effective solution for users seeking original components in a more economical format. Choosing a part from this group helps maintain the structural integrity of the suspension, avoiding the random selection of aftermarket alternatives with different characteristics.

By using original springs, it is possible to maintain the intended collaboration with shock absorbers, control arms, and the rest of the suspension system as designed by the manufacturer, contributing to stable vehicle handling in everyday use.

Expanding BMW Suspension Modernization

If you are planning a comprehensive repair or modernization of the rear suspension area in your BMW and require other elements from the same group, such as additional springs, leaf springs, or related suspension components, check the available parts in the BMW Springs and Leaf Springs category.

For drivers interested in optimizing servicing costs and making informed choices about original components, it is also worthwhile to explore tips on economical vehicle operation. Practical advice can be found in the article Economical Ford Operation – Where to Find the Biggest Savings in Mechanical and Body Repairs, which illustrates how an approach to original parts can influence long-term vehicle maintenance costs.