BMW 5 7 Series E39 E38 Saloon Aerial Radio Antenna Diversity Amplifier 8378090

BMW 5 7 Series E39 E38 Saloon Aerial Radio Antenna Diversity Amplifier is an original antenna system component designed for the 5 Series E39 and 7 Series E38 models. It provides stable radio signal amplification, which translates into more reliable station reception and reduced interference during daily use. It is a practical solution for users who want to restore the proper operation of the factory audio system in their BMW.

Specifications and technical data

• SKU: 8378090
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8378090
• Substitutable numbers: 65258378090, 8378090, 65248352774, 8352774
• Tire profile: 65535
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function of the antenna module

The presented antenna amplifier has been designed as a component of the radio signal reception system in BMW E39 and E38 series cars. Its task is to amplify the signal from the antenna before it is transmitted to the radio unit, which improves reception quality in varied road and urban conditions. The module works with the factory antenna installation, ensuring full compatibility with the vehicle's original equipment.

Technical characteristics and integration with the installation

The antenna amplifier module is an electronic component mounted in the antenna path, between the antenna and the radio. The design provided by the manufacturer, BMW, allows for:

• direct connection to the factory wiring harness,
• maintaining operating parameters consistent with the original audio system,
• stable power supply from the vehicle's electrical system.

Thanks to this, the installation process is straightforward, without the need to modify the wiring or use additional adapters. The module is prepared for operation in typical vehicle operating conditions, taking into account temperature fluctuations and vibrations.

Product condition and service application

The offered BMW antenna amplifier is a second-hand part, which allows for an economical repair of the radio system without sacrificing the manufacturer's original design. This type of part is particularly useful in situations where the vehicle exhibits symptoms such as signal fading, noise, or problems with station searching, and diagnostics point to a fault in the antenna path.

Choosing an original antenna module instead of universal replacements makes it easier to maintain the consistency of the installation and reduces the risk of issues with connector matching or operating parameters. It is a practical solution both for workshops specializing in the BMW brand and for users servicing their own cars.

Benefits of using an original antenna amplifier

Using a dedicated antenna module in the BMW E39 and E38 allows for:

• restoring the proper operation of the factory radio without interfering with the installation,
• maintaining the original architecture of the multimedia system,
• reducing interference and improving the stability of radio signal reception.

For users who value maintaining the factory configuration of the vehicle, this is a solution consistent with the manufacturer's specifications, while also being cost-effective compared to replacing the entire audio system.

Related categories and technical materials

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

For a comparison of solutions used in different brands and vehicle segments, as well as a better understanding of the differences in the construction of powertrains and their accompanying systems, the comparative material regarding sports models may be helpful – you can find it in the article Audi RS vs other models – what is hidden under the hood and chassis?.