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 stabilizes airflow under the vehicle and protects critical rear suspension components. This used OEM part is a sensible choice for repairs when you require factory-fitment and predictable installation.

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 underbody cover

The presented plate is dedicated to the rear underbody of the BMW Z4 E85 generation. Its task is to limit direct contact of mechanical components with water, dirt, and minor impacts from the road surface. Additionally, the cover helps streamline airflow under the car, which promotes stability at higher speeds and reduces turbulence in the rear suspension area.

Choosing an original cover plate ensures compatibility with the factory underbody geometry, which is important for both aerodynamics and the proper routing of lines and mounts in the rear section of the chassis.

Construction and fitment for the BMW Z4 E85

The cover has been developed specifically for the Z4 E85 underbody structure, taking into account the shape of the rear chassis, mounting points, and the layout of suspension components. As a result, installation is predictable, without the need for modifications or fitting universal replacements.

Key functional features of this plate include:

• factory-standard mounting hole placement,
• profile tailored to the rear underbody zone,
• maintenance of necessary clearances for suspension and exhaust system operation.

Such a solution facilitates service and reduces the risk of improper installation, which could cause unwanted vibrations or rubbing against other components.

Application in repairs and underbody upgrades

The used rear underbody cover plate is particularly suitable for situations where the factory component has been damaged due to contact with an obstacle, corrosion of mounting points, or removal during previous repairs. Using an original cover helps restore:

• protection of the rear underbody against dirt and moisture,
• proper airflow path under the car,
• an aesthetic, organized appearance of the lower chassis.

For workshops specializing in BMW and owners who care about the technical condition of their car, this is a practical way to restore the completeness of the underbody shielding without the need to invest in a new part.

Integration with other rear underbody components

The cover plate works in conjunction with other shields and wheel arch liners in the rear area of the vehicle, creating a cohesive protective system. A properly installed cover:

• limits the ingress of water and dirt around suspension mounts,
• helps protect lines and components routed in the rear underbody,
• reduces the risk of debris accumulation in hard-to-reach areas.

Thanks to this, periodic service and potential repairs in the rear of the car are simpler, and mechanical components are less exposed to accelerated wear.

Technical support and additional materials

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

For a better understanding of the role of the underbody and its impact on vehicle handling and the braking system, it is worth reading an article comparing sports constructions with standard versions: Audi RS vs other models – what is hidden under the hood and underbody?. This is a good supplement to your knowledge when planning work on the underbody and selecting the right parts.