Mounting in the bottom of the fuel filter The sensor detects water in the fuel For D3, D4, D6 Fuel Sensor Part Number: 3808616, 874572 Compatible Models: D3, D4, D6 Replaces Part Number: 3808616, 21139810 Compatible with the following models: D3-110I-A, D3-110I-B, D3-110I-C, D3-110I-D, D3-110I-E, D3-130A-A, D3-130A-B, D3-130A-C, D3-130I-A, D3-130I-B, D3-130I-C, D3-140A-D, D3-140A-E, D3-150I-D, D3-150I-E, D3-160A-A, D3-160A-B, D3-160A-C, D3-160I-A, D3-160I-B, D3-160I-C, D3-170A-D, D3-170A-E, D3-170I-D, D3-170I-E, D3-190A-B, D3-190A-C, D3-190I-A, D3-190I-B, D3-190I-C, D3-200A-D, D3-200A-E, D3-200I-D, D3-200I-E, D3-220A-D, D3-220A-E, D3-220I-D, D3-220I-E D4-180I-B, D4-180I-C, D4-180I-D, D4-180I-E, D4-210A-A, D4-210A-B, D4-210I-A, D4-210I-B, D4-225A-B, D4-225A-C, D4-225A-D, D4-225A-E, D4-225I-B, D4-225I-C, D4-225I-D, D4-225I-E, D4-260A-A, D4-260A-B, D4-260A-C, D4-260A-D, D4-260A-E, D4-260D-B, D4-260D-C, D4-260D-D, D4-260D-E, D4-260I-A, D4-260I-B, D4-260I-C, D4-260I-D, D4-260I-E, D4-300A-A, D4-300A-C, D4-300A-D, D4-300A-E, D4-300D-A, D4-300D-C, D4-300D-D, D4-300D-E, D4-300I-A, D4-300I-C, D4-300I-D, D4-300I-E Material: Plastic Color: Black Package Contents: 1 x Water Sensor Note: The package includes only the items listed above. Other products are not included. Light reflection and different display settings may cause slight color variations between the product image and the actual item. Measurement may vary by 1-3 cm.