JOHN DEERE TRACTORS:
• John Deere 6230/6330/6430/7430/7530 4045/6068 PowerTech 4.5L/6.8L Diesel (2006-2013)
JOHN DEERE BACKHOE LOADERS:
• John Deere 310J/310SJ/410J 4045 PowerTech 4.5L Diesel (2005-2012)
IMPORTANT:
This is a WATER-IN-FUEL (WIF) sensor — it detects water intrusion in the fuel system. Do NOT confuse with a fuel rail pressure sensor (RE520930), fuel temp sensor (RE516336), or coolant temp sensor (RE522823). This is a simple 2-pin switch-type sensor, not a variable-output pressure or temperature sensor. The #1 mistake is buying a pressure sensor when you need the WIF sensor from the fuel filter housing.
Failure symptoms: false water-in-fuel warning light, engine derate or shutdown as a protective measure, or no warning when water IS present. Water in common rail diesels causes catastrophic injector and pump damage, so a working WIF sensor is critical. If warning stays on after draining the separator, the sensor has likely failed. Check the 2-pin connector for corrosion first — moisture at the connector is the most common cause of false alarms.
⚠️ Verify RE519696 and 2-pin connector before ordering.
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