Volvo Penta Water-in-Fuel Sensor 3808616 – D3 / D4 / D6 Diesel
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Volvo Penta 3808616 is a genuine OEM sensor used in select Volvo Penta diesel fuel-system applications. Current parts references place this part in the D6-280A-A / Instruments schematic, while stronger application listings identify it as the water-in-fuel sensor mounted at the bottom of the fuel filter on D3, D4, and D6 engines.
Key Features
- Genuine Volvo Penta OEM part number 3808616
- Identified in current Volvo Penta references as a sensor, schematic object key 6
- Strongest current application detail identifies it as a water-in-fuel sensor
- Installed at the bottom of the fuel filter in current public application descriptions
Engine Compatibility
The strongest supportable fitment for 3808616 is within Volvo Penta D3, D4, and D6 diesel applications that use this style of fuel-filter water sensor. Current sources specifically associate it with D3 models including D3-140, D3-150, D3-170, D3-200, and D3-220, D4 models including D4-180, D4-210, D4-225, D4-260, and D4-300, and D6 models including D6-280, D6-300, D6-310, D6-330, D6-350, D6-370, D6-400, and D6-435. One source also notes use on older models up to 2019. Because sensor fitment can vary by filter head and production range, final fitment should still be confirmed by engine serial number.
Serial Number Fitment Notice
Match Volvo Penta part number 3808616 to your engine serial number and the correct Volvo Penta fuel-system diagram before ordering. Water-in-fuel sensors can look similar while fitting different fuel-filter bases or harness layouts, so exact application matters more than appearance alone.
When This Part Needs Replacement
This sensor should be replaced when the water-in-fuel warning becomes unreliable, the sensor body is damaged, the connector or wiring is compromised, or contamination or leakage is found during fuel-filter service. It is also worth checking anytime the fuel filter and filter base are already apart. This service guidance is a practical inference based on the part being identified as the water-in-fuel sensor at the bottom of the fuel filter.
Installation Notes
Confirm the exact application before installation, and compare the removed sensor carefully against the replacement part, especially at the connector and mounting point on the fuel filter base. Because current sources place this sensor at the bottom of the filter assembly, clean installation and correct sealing at the filter housing matter more than a quick visual match.
Alternate/Superseded Part Numbers
The reviewed sources continue to list 3808616 as the active Volvo Penta OEM number. Current aftermarket-style references also show REC3808616 as a related replacement reference, but that is best treated as a cross-reference number rather than a confirmed Volvo Penta supersession.
Parts Desk Insight
With sensors like this, the easy mistake is matching only by connector style. Checking the exact fuel-filter setup first usually saves time, especially when D3, D4, and D6 engines can share similar-looking fuel-system sensors across different production years.
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