Audi A8 D4 Q7 4L Engine Cover Insulation Top Cover V6 3.0 TDI 4H0103925B

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A8 D4 Q7 4L Engine Cover Insulation Top Cover V6 3.0 TDI is an original component from the Tappet and valve covers group, designed for V6 3.0 TDI diesel engines. The black cover provides an aesthetic finish to the engine bay and helps organize the service area.

Specifications and technical data

• SKU: 4H0103925B-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0103925B
• Substitutable numbers: 4H0103925B, 4H0 103 925 B
• Fuel type: Diesel
• Part type: Valve Cover
• Color: Black
• Category: Rocker & Valve Covers

Purpose and technical function

The cover has been specifically designed for V6 3.0 TDI diesel engines used in Audi A8 D4 and Audi Q7 4L models. As a shielding element in the cylinder head and valve train area, it stabilizes the accessory mounting system, limits the ingress of contaminants, and facilitates the identification of service points in the engine bay.

Thanks to its precise fit to the specific architecture of the powertrain, it ensures proper airflow around the engine, which promotes even heat dissipation and improves service ergonomics.

Construction, material, and color

The cover features a design adapted to the V6 layout, with contoured zones above the cylinder heads and locations for factory mounting points. The black color is consistent with the factory styling of the Audi engine bay, allowing the component to integrate harmoniously with other covers and wiring harnesses.

The arrangement of ribs and embossments enhances the rigidity of the entire cover, which reduces unwanted vibrations and noise. At the same time, the smooth surfaces make it easy to keep clean – dirt can be quickly removed during a standard inspection.

Benefits of using an original cover

Using a factory cover in a V6 3.0 TDI diesel engine provides a number of practical benefits:

• secure fit to the mounting points in the Audi A8 D4 and Q7 4L,
• an organized engine bay appearance, facilitating service work,
• reduction of dust and dirt accumulation on valve train components,
• stabilization of small cables and harnesses running in the upper part of the powertrain.

This solution is particularly beneficial for vehicles used intensively, where regular inspections and easy access to components are important for maintaining the efficiency of the drivetrain.

Condition, installation, and compatibility

The item comes from a used vehicle, which allows for a favorable cost-to-quality ratio while maintaining factory fitment. Installation is performed using existing mounting points in the engine bay, without the need for any modifications to the engine structure.

Before purchasing, it is worth verifying compatibility with the specific version of the V6 3.0 TDI diesel engine in your Audi to ensure proper fitment and full functionality of the cover in the cylinder head and valve area.

Expanding the Audi engine cover system

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as additional covers, shields, or masking elements in the cylinder head region, check out the available parts in the Audi Tappet and valve covers category.

For users who are simultaneously servicing thermal comfort systems in the vehicle, a guide describing the selection and operation of air conditioning and heating components may be helpful – detailed tips can be found in the article Air conditioning and heating – part selection and maintenance for year-round comfort.