Reference OE/OEM Number - 1J0127247 ,1J0127247A ,1J0127247E . 1J0127247 ,1J0127247A ,1J0127247E . Thermostatic Bypass Valve . Thermostatic Bypass Valve is integrated into the fuel filter housing - When the fuel reaches a sufficient temperature, the valve closes the bypass, allowing normal flow from the tank through the filter.
