The Genuine BMW Cable Duct Lower Section Rear Window - 61136978340 is a high-quality replacement part for BMW vehicles. It is designed to fit the lower section of the rear window and is used to secure and protect the electrical cables that run through it. This cable duct is made from durable materials and is built to the same specifications as the original part, ensuring a perfect fit and reliable performance. It is an essential component for maintaining the proper functioning of the rear window and ensuring the safety of the vehicle's electrical system.