Harmon Kardon Extension Harness Adapter for BMW E38 E39 E46 E53

Harman Kardon Extension Harness Adapter — BMW E38, E39, E46, E53

A plug-and-play wiring adapter for retaining or integrating the factory Harman Kardon audio system when fitting an aftermarket head unit to BMW E-series vehicles. Eliminates the need for cutting or splicing factory wiring — simply plug in and connect.

An essential part of a clean, reversible aftermarket audio install on HK-equipped BMW models.

Compatible Vehicles

• BMW E38 7 Series — with Harman Kardon audio
• BMW E39 5 Series — with Harman Kardon audio
• BMW E46 3 Series — with Harman Kardon audio
• BMW E53 X5 — with Harman Kardon audio

⚠️ Only required on vehicles fitted with the factory Harman Kardon audio system. Standard (non-HK) audio systems do not need this adapter.