BMW F31 Coil Spring Rear Left Right N/O/S Suspension Springs Set 6851728

BMW F31 Coil Spring Rear Left Right N/O/S Suspension Springs Set is an original component from the Leaf and coil springs group, designed for the rear axle of the vehicle. The set includes both sides – left and right – which facilitates maintaining consistent suspension performance parameters and stable vehicle handling. This solution is particularly beneficial when replacing a pair of springs on an axle, ensuring predictable vehicle behavior.

Specifications and technical data

• SKU: 6851728-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6851728
• Substitutable numbers: 6851728, F31, EG, 33536851728
• Location on the vehicle: Rear, Right, Left
• Part type: Coil Spring Set
• Category: Leaf & Coil Springs

Purpose and vehicle placement

The presented set is dedicated for installation on the rear axle of the BMW F31, with clearly defined placement for the left and right sides. Such a fit allows for maintaining proper suspension geometry and even load distribution when driving with passengers and luggage. The springs work in direct conjunction with shock absorbers and other suspension components, responsible for:

• maintaining the proper height of the rear bodywork,
• vehicle stabilization during braking and acceleration,
• controlling suspension deflection on uneven surfaces.

Technical and functional characteristics

The spring set has been designed in accordance with the manufacturer's factory specifications, which translates into predictable suspension performance. Properly selected stiffness and working travel of the springs support driving comfort while ensuring proper vehicle control in typical road conditions. In practice, this means that after installation:

• the rear axle maintains stable support even under variable loads,
• excessive suspension "bottoming out" is limited,
• the risk of uneven wear of other chassis components is reduced.

Benefits of using original BMW components

Choosing a spring set dedicated to the BMW F31 allows for maintaining consistency with the factory suspension configuration. Proper fitment for the specific model minimizes the risk of geometry issues, unwanted noises, or unpredictable vehicle behavior. This is particularly important in cars where precise handling and repeatable steering response are essential. Original origin from the BMW brand also facilitates easier diagnostics in the future – suspension performance parameters remain consistent with the manufacturer's specifications, which eases cooperation with factory safety and traction control systems.

Component condition and service application

The product is in the Leaf and coil springs category and is intended primarily for service applications – replacing worn or damaged rear suspension springs in the BMW F31. Using a complete set for the axle allows for avoiding differences in performance characteristics between the left and right sides, which is particularly important for precise chassis tuning. Such a solution is recommended especially when:

• one of the springs has suffered mechanical damage,
• visible differences in suspension height are observed on both sides,
• the vehicle is operated with a heavier load on the rear axle.

Expanding BMW suspension upgrades

If you are planning a comprehensive repair or upgrade of the rear suspension area in your BMW and need other components from the same group, such as additional springs, leaf springs, or auxiliary suspension elements, check the available parts in the BMW Leaf and coil springs category. To better understand the importance of using appropriate, branded components in key vehicle systems, it is worth reading the guide on lighting – you will find it in the article Original headlights or replacements? Check why used headlights are a guarantee of safety and perfect illumination.