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OEM Fuel Pressure Regulator (also known as fuel pressure relief valve) on the 2016-2019 Nissan Titan XD with the 5.0L Cummins Diesel Engine.
The fuel pressure regulator works with the mechanical engine pump and ECU to maintain desired fuel pressure in the fuel rail. When this valve opens, it returns fuel back to the fuel tank and stage 1 fuel filter assembly.
Note: This does not fit the VK56VD motor
Fits: