BMW 3 Series E90 E92 LCI Suppression Filter for Antenna 9110621 652 9110621

The BMW E90 E92 Antenna Amplifier Module Filter is an original BMW antenna system component designed for the 3 Series E90 and E92 models. It ensures stable radio signal amplification and interference filtering, which translates to more reliable station reception and improved daily driving comfort. This is a solution for users who expect seamless integration with the vehicle's factory electronics.

Specifications and technical data

• SKU: 9110621
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9110621
• Substitutable numbers: 65209110621, 9110621
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and Function of the Antenna Module

The presented module acts as an antenna amplifier with a built-in filter, responsible for processing the radio signal within the BMW antenna system. Its tasks include:

• amplifying the signal received by the roof or body antenna,
• reducing interference originating from the vehicle's electrical system,
• ensuring stable operation with the factory radio and multimedia systems.

This allows the radio in the BMW 3 Series E90/E92 to operate predictably, with less susceptibility to noise and signal dropouts under typical driving conditions.

Compatibility and Integration with BMW Systems

The module is designed as part of the BMW antenna system, meaning full integration with the original wiring harness and mounting points in the body. In practice, this translates to:

• maintaining the factory antenna system architecture,
• seamless operation with the radio's head unit and other body modules,
• no need for wiring modifications or the use of universal adapters.

This solution is particularly beneficial for users who wish to keep their vehicle in a configuration close to factory specifications, without experimenting with aftermarket parts of uncertain electrical characteristics.

Characteristics of the Used Component

The offered module comes from the secondary market and is classified as a used part. This means the component was previously used in another vehicle but retains the functionality required for continued operation in the antenna system. For many users, this represents a sensible compromise between purchase cost and maintaining the original manufacturer's specifications.

Choosing a used BMW antenna module helps reduce the risk of compatibility issues common with cheaper aftermarket alternatives, while maintaining the correct operating parameters of the radio system.

Application in Service Practice

The antenna amplifier module with filter is particularly useful in situations where the vehicle exhibits:

• deterioration in radio station reception quality,
• intermittent signal dropouts when driving in built-up areas,
• reception problems after body repairs or replacement of the windshield/antenna.

Replacing the module with a functional OEM unit is often one of the basic diagnostic steps in workshops specializing in the BMW brand, as the antenna system is sensitive to the quality of the components used.

Other Products and Technical Knowledge

If you are looking for other parts in the "Miscellaneous for BMW" category, check out our dedicated offer: other BMW parts. You will find a wide selection of body components, electronics, and accessories to comprehensively care for your car.

For a comparison of solutions used in different brands and sports versions, it is worth reading the analysis of construction in the blog article Audi RS vs. other models – what lies under the hood and chassis?, which discusses, among other things, differences in manufacturers' approaches to powertrains and accessories.

Summary

The BMW E90 E92 Antenna Amplifier Module Filter is a practical solution for users who want to restore the proper functioning of their BMW's radio system while maintaining the original manufacturer's concept. The original nature of the part, its fit with the existing installation, and its specialized signal filtering and amplification function make it a sensible choice for both workshops and individual users who care about the correct operation of their onboard electronics.