2016-2019 BMW 7 Series Antenna Amplifier 9384054

Also known as

Antenna Diversity Module

Radio Amplifier

Aerial Signal Booster

Diversity Antenna Amplifier

Signal Trap

AM/FM Amplifier

What this part does

The Antenna Amplifier is an electronic module responsible for receiving and boosting radio frequency signals captured by the grid lines integrated into the vehicle's rear glass. It acts as a diversity system, continuously evaluating the signal strength across multiple antenna circuits and selecting the strongest feed to send to the infotainment system. This component manages AM/FM radio frequencies, and on many models, it also handles the signals for the remote central locking system. Located under the interior trim near the edge of the rear window, it relies on a clean, moisture-free environment to operate correctly. A failed unit typically results in heavy static on all radio stations, an inability to find channels, or remote keys that only work when held directly against the rear glass.

Fits these vehicles

OEM and interchange numbers

9384054

65209384054

65-20-9-384-054

Before you order

Verify your original module displays the exact number 9384054 or 65209384054. BMW uses multiple different versions of the 7 Series antenna amplifier depending on regional radio frequencies, specific infotainment options, and keyless entry systems. These variations are not cross-compatible. Before replacing a suspected faulty module, check that no aftermarket metallic window tint has been applied to the rear glass, as metallic tint will block radio and key fob signals and create symptoms identical to a failed amplifier. If your original unit shows signs of corrosion, inspect the rear window seals and C-pillar drains to ensure the replacement is not exposed to the same moisture leak.