Prevent leaks and keep your fuel system sealed tight with the Merchant Automotive Water In Fuel (WIF) Sensor O-Ring for 2001–2016 GM 6.6L Duramax engines.
This simple yet crucial component replaces the original O-ring on your WIF sensor, helping restore a proper seal and preventing fuel seepage. When you're servicing the sensor or changing your fuel filter, this OE quality O-ring ensures a snug fit and a lasting seal for your Duramax’s fuel system.