BMW Z4 Series E85 Roadster Underfloor Channel Cover Plate 7134377

BMW Z4 Series E85 Roadster Underfloor Channel Cover Plate is an original protective component designed for the rear underbody of this model. Engineered by BMW, the plate provides stable coverage for critical suspension and floor components, improving durability and operational comfort. This used OEM part is a sensible choice for repairs when you require factory-fit quality without unnecessary modifications.

Specifications and technical data

• SKU: 7134377
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7134377
• Substitutable numbers: 51717182692, 51717134377, 7134377
• Location on the vehicle: Rear
• Category: Other Exterior Parts & Accessories

Purpose and function of the BMW Z4 E85 underfloor cover

The underfloor cover plate for the BMW Z4 E85 is responsible for protecting the rear underbody area from water, mud, road salt, and minor stone impacts. Thanks to its factory geometry, the component effectively:

• limits direct contact of contaminants with suspension and floor components,
• helps maintain stable operating conditions for components in the rear of the vehicle,
• assists in maintaining proper airflow under the car.

A properly selected underfloor cover is important not only for mechanical protection but also for maintaining the aerodynamics intended by the manufacturer for the rear of the vehicle.

Compatibility and fitment for the BMW Z4 E85

The presented plate has been constructed specifically for the BMW Z4 E85 model, which translates into precise fitment with factory mounting points. The lack of need for modifications or adjustments to the mounts facilitates installation and reduces service or workshop time.

The original origin of the component means that the design, shape, and placement of mounting holes are consistent with BMW's factory technical documentation. This is particularly important in the case of underfloor covers, where even small deviations can cause unwanted vibrations or noise while driving.

Characteristics of the used component

The underfloor cover is offered as a used OEM part, which allows you to combine factory fitment with an attractive price compared to a new part. A used component of this type in most cases retains full protective functionality, and any signs of use do not affect its primary task, which is securing the rear underbody.

Choosing an original, used cover plate is particularly beneficial for sports and recreational vehicles such as the BMW Z4 E85, where maintaining a design consistent with the manufacturer's specifications without compromising on fitment is essential.

Benefits of installing an original underfloor cover plate

By choosing to install this cover in your BMW Z4 E85, you gain a number of practical benefits:

• factory fitment to the rear underbody without interfering with the vehicle's structure,
• increased protection of suspension and floor components against external factors,
• maintenance of the airflow characteristics intended by the manufacturer under the car,
• reasonable repair costs due to the use of a used OEM part.

Such a solution is particularly recommended for post-accident repairs, replacing damaged covers after contact with an obstacle, or during comprehensive underbody service.

If you are planning a comprehensive repair or upgrade of the underbody area in your BMW and need other components from the same group, such as covers, protective plates, or additional shielding screens, check the available parts in the Other BMW category.

More about the importance of the underbody and protective components

To better understand the role of covers and underbody construction in sports and performance cars, it is worth familiarizing yourself with an analysis of the differences between standard versions and more powerful variants. In this context, an article describing, among other things, the construction of the underbody and associated systems in high-performance models will be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and underbody?.

If you are interested in the broader context of choosing used OEM parts for premium cars, including BMW, it is also worth reading an analysis of market trends and arguments in favor of such a solution: Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026.