The Genuine BMW Trailer Wiring Harness - 71602156526 is a high-quality wiring harness designed specifically for use with BMW vehicles. It is used to connect a trailer to the vehicle's electrical system, allowing for the transfer of power and signals between the two. This wiring harness is made from durable materials and is designed to fit seamlessly with the vehicle's existing wiring. It is a genuine BMW product, ensuring compatibility and reliability. The harness is easy to install and provides a secure and efficient connection for towing trailers.