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 Replaces Part Numbers: 3808616, 21139810 Compatible with models: D3, D4, D6 Compatible with: 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: Only the above items are included. Other products are not included. Light reflection and different display settings may cause slight color variations between the item and the image. Measurement may vary by 1-3 cm.