The 15305174 is a white cavity plug used for sealing unused cavities in automotive connector housings. This component prevents the ingress of dust, moisture, and other contaminants, ensuring the integrity of the electrical connection system. It is designed without a restraint ring. This plug is compatible with several Aptiv connector series, including the APEX® 2.8 SensoMate™, APEX® 2.8 Sealed, and APEX® Halogen Bulb series, making it a versatile solution for various vehicle applications.