Upgrade your BMW E39's functionality with this URO Parts Electric Window Regulator, specifically designed for the rear left side of your vehicle. Compatibility with models 528, 530, and 540 from 1999 to 2003 ensures a precise fit, restoring seamless operation. The manufacturer part number, 51358252429, matches several interchange part numbers including 47-2135, 749-001, and 20-0055, verifying its reliability and ease of reference for cross-comparison. Constructed with attention to detail, this window regulator is not a vintage part but rather a modern replacement ensuring longevity and performance. Originating from China, it comes with a reassuring 1-year manufacturer warranty. Whether you're addressing a need for functionality or completing a restoration project, this regulator is an essential component for your vehicle's comfort and convenience.