BMW Z4 Series E89 Sound Insulation Trunk Right O/S 9128490

BMW Z4 Series E89 Sound Insulation Trunk Right O/S is an original upholstery component designed for installation on the right side of the luggage compartment. Specifically engineered for this BMW model, it ensures a seamless interior finish, improves acoustic comfort, and helps protect the bodywork against minor mechanical damage. It is a practical solution for users looking to restore the factory look of the trunk or replace a missing part after repairs.

Specifications and technical data

• SKU: 9128490
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9128490
• Substitutable numbers: 9128490, 51489128490
• Location on the vehicle: Right
• Category: Other Interior Parts & Accessories

Purpose and function in the BMW Z4 E89

The presented BMW Z4 Series E89 Sound Insulation Trunk Right O/S is a component tailored to the body structure of the BMW Z4 E89 generation roadster. Installed on the right side of the trunk, it is responsible for:

• dampening noise coming from the wheel arch, suspension, and the rear part of the body,
• providing an aesthetic finish to the side wall of the luggage compartment,
• protecting internal body panels from abrasions caused by transported items,
• maintaining the factory geometry and fitment of upholstery elements.

Thanks to its precise fit to the body shape, installation is predictable and straightforward, without the need for modifications or fitting universal soundproofing materials.

Construction and fitment on the right side of the vehicle

The element has been designed with a specific location on the vehicle in mind – the right side of the trunk. This means that:

• the shape and contours correspond to the factory mounting points in the BMW Z4 E89,
• mounting holes and cutouts are consistent with the original trunk layout,
• once installed, the continuity of the upholstery line and access to service points in the trunk are maintained.

Such a solution allows for restoring a consistent, factory look of the trunk interior after body repairs, component replacement, or the removal of previous insulation.

Performance characteristics and application

The original trunk sound insulation in the BMW Z4 E89 serves several important functional roles that affect daily vehicle use:

• reduction of vibrations and resonances in the rear part of the body,
• limitation of road noise and suspension operation sounds entering the cabin,
• increased resistance of the trunk surface to scratches from luggage, tools, or accessories,
• maintaining order in the luggage space by covering structural elements.

This solution is particularly useful for interior restoration, preparing the car for sale, or after accident repairs when it is necessary to recreate the original trunk layout.

Condition, origin, and mounting compatibility

The offered item comes from the BMW brand and is an OE group part, which means it complies with the manufacturer's factory standards regarding dimensions and mounting methods. The product is in used condition, making it a cost-effective solution while maintaining the original specification. Before installation, it is recommended to perform a standard check of the mounting points and compare the shape with the current trunk layout in the vehicle.

If you are planning a comprehensive repair or upgrade of the rear trunk area in your BMW and need other elements from the same group, such as additional upholstery panels, covers, or small fasteners, check out the available parts in the Other BMW category.

Technical support and vehicle project development

Selecting the right interior and body elements is also important for mechanical modifications or performance improvements. If you are interested in how manufacturers differentiate the construction of sports versions compared to standard models – from the engine and brakes to the chassis – it is worth checking out comparative material. You can find more on this topic in the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how structural changes affect the character of a car.