Audi A4 S4 B8 Rear Axle Coil Spring Left Right N/O/S SET 111501103HA KBA91391

Audi A4 S4 B8 Rear Axle Coil Spring Left Right N/O/S SET is an element from the Leaf springs and coil springs group, designed for operation on the left and right side of the rear axle. The use of properly selected coil springs allows for restoring the correct suspension geometry, stability, and predictable vehicle handling. This set is a practical solution when replacing both springs on the axle to achieve consistent suspension performance.

Specifications and technical data

• SKU: 111501103HA
• Mark: Audi
• Condition: Used
• OEM Part Number: 111501103HA
• Substitutable numbers: 111501103HA, 111 501 103 HA
• Location on the vehicle: Rear, Right, Left
• Part type: Coil Spring Set
• Category: Leaf & Coil Springs

Purpose and vehicle placement

The presented set of springs is intended for installation on the rear axle of the vehicle, with the possibility of installation on both the left and right side. This solution facilitates suspension service – the mechanic can use one reference for both sides, which reduces the risk of errors when selecting parts and speeds up the repair process. Placement on the rear axle is crucial for maintaining the correct body height, ride comfort, and stability during braking and cornering. Replacing springs in pairs allows for uniform suspension deflection and consistent vehicle behavior in all conditions.

Technical and functional characteristics

The rear axle coil springs in the Audi are responsible for carrying vertical loads, working in conjunction with shock absorbers and other components of the multi-link suspension. Properly selected spring stiffness affects:

• maintaining the correct body height under various loads,
• stability during dynamic driving,
• damping of unevenness in combination with shock absorbers,
• even tire wear and correct wheel geometry. Thanks to a design tailored to the specific Audi A4 / S4 B8 platform, the springs work with factory mounting points and guiding elements, which facilitates installation and allows for maintaining factory driving characteristics. This is especially important for cars used on a daily basis, where predictable, repeatable suspension behavior counts.

Benefits of using an original Audi element

Choosing rear axle springs from the Audi offer allows for maintaining consistency with the vehicle's factory specification. Original geometry and operating characteristics of the springs translate into proper load distribution in the suspension and compatibility with stock shock absorbers and other rear axle components. The main advantages of using this set include:

• secure fit to the Audi A4 / S4 B8 platform without the need for modifications,
• maintaining the handling characteristics intended by the manufacturer,
• the possibility of replacing both springs on the axle with one set,
• reducing the risk of incorrect selection of spring hardness or height.

Component condition and service application

The springs come from disassembly and are offered as a used service element. This type of part is a good solution for maintenance repairs when the goal is to restore proper suspension operation while maintaining reasonable costs. Replacing springs is recommended, among other things, in the case of visible signs of material fatigue, uneven body settling, or mechanical damage to the old spring. Due to the importance of springs for driving safety, installation in a specialized service center is recommended, following the vehicle manufacturer's procedures and checking the geometry after the work is completed.

Expanding Audi suspension service

If you are planning a comprehensive repair or upgrade of the rear axle suspension area in your Audi and need other elements from the same group, such as additional springs, leaf springs, or cooperating elements, check the available parts in the Audi leaf springs and coil springs category. For users interested in wider use of parts from disassembly in tuning projects or budget upgrades, practical tips on selection and safe installation can be found in the article Emotions and design – visual and mechanical tuning of a Seat using components from disassembly, which shows how to effectively plan modifications using OEM components.