Fitment: Ignition lock assembly compatible with F450, E150, E250, E350, Explorer, Expedition, Windstar, and Econoline models, as well as Lincoln Mark, Navigator, and Town Car. Part Number: Ignition lock cylinder switch with 2 keys, replacement for 1521990A, 7C3Z-1521990-A, 7C3Z1521990A, 7C3Z1521990. Please confirm compatibility with your vehicle model and reference images before ordering. Reliable Performance: This lock cylinder set is constructed from high-quality materials to ensure durability, compression resistance, and long-term wear resistance. Timely Replacement: The ignition lock cylinder switch plays a critical role in vehicle starting and ignition system control. Replacing worn, damaged, or outdated lock cylinders helps prevent malfunctions such as inability to lock/unlock doors or rotate the key smoothly, supporting overall vehicle safety. Slight variations in appearance may occur between production batches, but functionality remains unaffected. Color: Silver Material: Plastic + Aluminum Package Contents: 1 x Door Lock Cylinder Kit Note: Color representation may vary slightly due to lighting conditions and screen settings. Measurement tolerance is ±1–3 cm.