Audi RS4 B8 Boot Trunk Speaker Spare Wheel Holder Audio Kicker 8K9035382B

Audi RS4 B8 Boot Trunk Speaker Spare Wheel Holder Audio Kicker is an original audio component designed for installation in the rear of the vehicle, specifically engineered for the demanding Bang & Olufsen sound system. Thanks to its factory fitment and precise construction, it serves as a reliable service solution for repairing or completing the acoustic equipment in an Audi RS4 B8. It is a practical choice for users who wish to maintain sound consistency and compatibility with the factory installation.

Specifications and technical data

• SKU: 8K9035382B-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9035328B
• Substitutable numbers: 8K9035328B, 8K9 035 328 B
• Location on the vehicle: Rear
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function in the audio system

The presented subwoofer is a component of the Bang & Olufsen sound system used in the Audi RS4 B8 generation, responsible for handling low frequencies in the rear of the cabin. Its placement in the rear area of the vehicle allows for even bass distribution, which translates into a more cohesive, spatial sound for the entire audio setup.

As a component dedicated to a specific equipment configuration, the subwoofer works with the factory amplifier and wiring, which facilitates installation and reduces the risk of compatibility issues. This solution is particularly beneficial for professional repairs or restoring the vehicle's original specifications.

Construction and installation fitment

The subwoofer has been designed as a component installed in the rear of the body, taking into account the interior geometry of the Audi RS4 B8. The properly selected housing and mounting method ensure stable speaker seating and minimize unwanted structural resonances.

Factory fitment for a specific model means that:

• compatibility with original mounting points is maintained,
• there is no need to interfere with the body structure,
• installation proceeds in a manner similar to the manufacturer's service procedures.

As a result, the subwoofer is a practical choice when replacing a damaged component or restoring the full functionality of the Bang & Olufsen system.

Performance characteristics and service application

As an original Audi audio component, the subwoofer has been adapted to operate within the factory multimedia system environment. The appropriate impedance and acoustic parameters are tuned to the other speakers and the amplifier, which allows for maintaining a consistent sound character throughout the vehicle.

The product is particularly suitable when:

• it is necessary to replace a damaged subwoofer in the rear of the car,
• the vehicle has undergone body repairs in the rear area and it is required to restore the complete audio equipment,
• the user wants to maintain the original Bang & Olufsen system configuration without using universal replacements.

This approach allows for preserving the factory character of the interior and the predictable behavior of the sound system during daily use.

Product condition and benefits of choosing a used part

The offered subwoofer is a used component, which represents a reasonable compromise between cost and maintaining the vehicle's original specifications. Choosing a used OEM part allows for matching the existing installation without the need to modify harnesses or use adapters.

For many Audi RS4 B8 users, this is an effective solution for post-accident repairs or restoring full audio system functionality, especially when the priority is maintaining consistency with the factory Bang & Olufsen equipment.

Integration with other Audi equipment

The sound system in RS versions is one of the hallmarks of these models, alongside the drivetrain, suspension, and brakes. A properly selected subwoofer in the rear of the vehicle completes the entire configuration, ensuring adequate low-frequency response and acoustic comfort while driving.

If you are interested in a broader context of the differences between RS versions and standard Audi variants – including equipment, mechanical systems, and parts selection – it is worth checking out our guide: Audi RS vs other models – what is hidden under the hood and chassis?.

Expanding configuration within the Audi brand

If you are planning a comprehensive repair or upgrade of the additional equipment zone in your Audi and need other components from the same group, such as speakers, control modules, or electrical installation elements, check out the available parts in the Other Audi category.