The Samsung DC64-00519B Washer Door Lock Switch is likely a genuine OEM part designed to securely lock the door of select Samsung front-load washers during the wash and spin cycles, ensuring safety and preventing accidental openings. It appears to be compatible with models in the WF2, WF3, WF4, and WF5 series, making it essential for maintaining your washer's performance. Common symptoms that may indicate the need for this part include the door not locking or unlocking properly, unusual noises, leaks, or clothes remaining wet after washing. It’s advisable to verify your washer's model number for compatibility before purchasing, as installation is straightforward with basic tools, and this high-quality part is expected to guarantee a perfect fit and long-lasting use.