The DG94-01643B is a genuine OEM Samsung oven partition/divider assembly used on Flex Duo-style ranges to split the oven cavity into upper and lower zones. When installed, it creates a thermal barrier and airflow separation so the range can run different modes/temps in each zone (model dependent). The partition must seat fully into the cavity guides and align with the rear ducting/baffle so convection airflow and temperature sensing remain stable. Common issues are warping from overheating, damaged seals/edges, bent alignment tabs, or poor seating that causes heat leakage between zones, uneven cooking, or error conditions related to partition detection (platform dependent). IMPORTANT: This is a fit-critical part—confirm exact model and cavity style. CRITICAL: Let the oven cool completely before handling; edges can be sharp.