Replaces part numbers: 12639277, 12639450, 97384931, 12642623, TP3018, 12664429 Function: Alerts the Engine Control Unit (ECU) and/or dashboard indicator when water is detected in the vehicle's fuel supply. Manufactured to meet specification for fit, form, and function. PREMIUM QUALITY - High-quality Water in Fuel Sensor, also known as WiF sensor, typically integrated into the fuel filter, detects the presence of water in fuel and triggers a warning signal. FITMENT - Compatible with 2001-2011 6.6L LB7, LBZ, LML, LGH, LMM engines, including 2001-2011 2500 HD, 2007 2500 HD Classic, 2001-2006 3500, 2007 3500 Classic, 2007-2011 3500 HD. REPLACEMENT PART NUMBERS - Replaces 12639277, 12639450, 97384931, commonly used on 2001-2011 6.6L LB7, LBZ, LML, LGH, LMM engines. DIRECT REPLACEMENT - Designed for direct installation with proper fit and function. Constructed with quality materials to meet or exceed original equipment standards. Material: Metal + Plastic Color: Black + White Package Contents: 1 x Water in Fuel Indicator Sensor Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display settings may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.