This is a replacement fuel in water alarm harness including the bowl sensor that connects between the EVC harness on a D3, D4 or D6 and a fuel bowl 877762. see picture.
This cable and sensor is fitted on pre-filter, part number 877762 used up to about 2011 on any D3, D4 or D6.
If you need specific spare parts on any pre-filter installation or fuel in water alarm harness please call 01326 370060.
