I am going to change my water / fuel filter / separator this weekend. The shop manual states that I need to unplug and then unscrew the WFS (water in fuel sensor) unscrew the water / fuel filter / separator put on the new water / fuel filter / separator and then replace the o ring on the WIF. I did not have the o ring so the dealership sent an e-mail to DC and I got the washer today. The washer I have now is a brass washer like one that goes on a banjo fitting. Has anyone replaced the water / fuel separator and do I have correct washer for the connection between the WIF and water / fuel filter / separator?

While getting my new airbox today, Sean Tierney(stierney@grubbsauto.com)(817-268-3121 x8451) parts manager went over the fuel system for me from the tank to the high pressure pump under the alternator. There is no breakdown on his diagrams for the wif sensor. The whole plastic sensor(5143002AA) is full retail priced at $9.35

I ordered one to attach to my filter I purchased earlier but haven't used.