The owners manual is in the garage so I'm quoting this from memory which is sometimes faulty. I think the suggested replacement is 25K miles.
If you get the warning light, it means that water has accumulated in a water resivour at the bottom of the filter and you need to change it immediately.
Some on the board do it themselves by either replacing the whole filter or draining the fuel filter through the bottom and then pumping new fuel in with a hand pump. I just replace the whole filter.
Note the wiring for this system is delicate if you do it yourself be careful with the wires. I twisted mine a bit and developed a short somewhere. So now when I go through a carwash or drive through rain or mist of fog, a short develops and falsly indicates that water is in my filter. The light goes on and off intermittently in damp conditions.
_________________ 2005 Black CRD Limited w/105,000 miles
Mann Provent 200, Airbox Mod, ORM Mod
New 545RFE, TC & Redesigned pump @ 25,020 miles
New EGR Flow Control Valve @ 25,020 miles
New Transfer Case input/output seals @ 32,787 miles
SEGR Kit @ 52,000 miles
SunCoast TC and Transgo Shift Kit @ 52,000 miles
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