Audi A8 D4 Aerial Antenna Amplifier Diversity 04S 4H0035225H

Audi A8 D4 Aerial Antenna Amplifier Diversity is an original antenna system component responsible for stable amplification of radio signals and onboard systems. Thanks to its factory-engineered Audi design, it ensures precise fitment to the bodywork installation and predictable performance under vehicle operating conditions. This is a practical solution for users looking to restore proper signal reception in their A8 D4.

Specifications and technical data

• SKU: 4H0035225H
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0035225H
• Substitutable numbers: 4H0035225H, 4H0 035 225 H, 920195518, 920 195 518
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function in the vehicle

Audi A8 D4 Aerial Antenna Amplifier Diversity operates within the vehicle's body antenna system, responsible for amplifying and distributing signals from the antennas to the receivers in the vehicle. The applied diversity technology allows for the selection of the best available signal from multiple antenna paths, which reduces interference and improves reception continuity while driving.

This component is particularly important in A8-class vehicles, where the multimedia system, communication systems, and comfort functions require a stable, high-quality signal. Replacing a worn or damaged amplifier with an original Audi component allows for the restoration of the factory installation's proper operation.

Construction and integration with the Audi installation

The antenna amplifier has been designed as part of the Audi A8 D4 body system, taking into account specific wiring harness routing, mounting points, and the characteristics of roof or glass antennas. This means:

• factory connectors matched to the Audi wiring harness,
• a design prepared for installation in the designated body location,
• tuning with the antenna system and vehicle receivers.

As a result, installation is straightforward, without the need for wiring modifications or the use of additional adapters, and the entire system maintains the parameters specified by the manufacturer.

Benefits of using an original amplifier

Using an original Audi antenna amplifier in the A8 D4 model provides a number of practical operational benefits:

• more stable signal reception compared to a faulty or non-original component,
• maintenance of compatibility with the factory multimedia and communication system,
• certainty of electrical and mechanical fitment for the specific A8 generation,
• reduced risk of installation errors due to the design intended by the vehicle manufacturer.

This solution is particularly beneficial when diagnosing issues with signal loss, noise, or unstable receiver performance in the vehicle.

Component condition and service application

The offered antenna amplifier is a used part, sourced from dismantling, which allows for an economical repair of the antenna system while maintaining original Audi specifications. This type of component is suitable both for standard replacement of a damaged module and for comprehensive restoration of the antenna installation in the A8 D4 model.

Related components and Audi system development

In modern Audi models, including high-performance versions, antenna systems, controllers, and communication modules work in conjunction with advanced drivetrain and suspension systems. If you are interested in how the manufacturer differentiates technical solutions between standard and sports versions, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the construction of engines, brakes, and chassis, as well as related components.

If you are planning a comprehensive repair or upgrade of the bodywork and antenna installation in your Audi and need other elements from the same group, such as antenna modules, signal amplifiers, or additional installation components, check the available parts in the Other Audi category.