Hengst H438WK Fuel Water Separator Filter
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Hengst

Hengst H438WK Fuel Water Separator Filter

Brand Hengst H438WK
Fits Audi · 6 vehicles

Fuel water separation. Helps keep water out of the fuel system.

Synthetic blend media. Provides efficient filtration with durable filter material.

Cross-references 8T0127401A, 308412 and WF8412 for the same application. See all 3.

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Hengst H438WK Fuel Water Separator Filter

The Hengst H438WK is a fuel water separator filter with synthetic blend media for diesel fuel systems that require water removal and clean fuel flow. It is listed for select Audi applications, including Audi A6 Quattro, Audi A8 Quattro, Audi Q5, and Audi Q7 fitments.

Key Features

  • Synthetic blend filter media for fuel system filtration
  • Fuel water separator design for separating water from diesel fuel
  • In-line configuration
  • Direct-fit application coverage for select Audi models
  • Cross-reference part numbers include 8T0127401A and WF8412
  • Part number H438WK for ordering and catalog lookup

Detailed Description

Hengst H438WK is a fuel water separator filter built for select Audi diesel applications where water contamination control is critical. The synthetic blend media supports filtration in the fuel delivery path while the in-line design places the unit directly in the fuel circuit. Compatible vehicle coverage includes Fits 2014 Audi A6 Quattro, N/A; Fits 2016 Audi A8 Quattro, N/A; Fits 2014-2016 Audi Q5, N/A; and Fits 2015 Audi Q7, N/A. This part cross-references 8T0127401A and WF8412 for the same application. Search terms such as Audi Q5 fuel water separator filter, Audi A6 Quattro fuel filter, and Hengst H438WK help identify the correct replacement.

What It Is Used For

  • Removing water from diesel fuel before it reaches sensitive fuel system components
  • Replacing a restricted or contaminated fuel water separator filter
  • Restoring proper fuel flow in Audi diesel fuel delivery systems
  • Addressing fuel contamination concerns that can affect drivability

Installation Notes and Tips

Install in the in-line fuel circuit only on the listed applications. Verify the vehicle year, model, and fuel system configuration before ordering, especially for the 2014 Audi A6 Quattro listing noted as to 04/2014. Mounting material is not included. Follow the vehicle service procedure for fuel system depressurization, priming, and leak checks after installation.

Quality Assurance

Hengst is an established filtration brand known for OE-level fuel and air filtration components. H438WK is cataloged as a fuel water separator filter with synthetic blend media for the listed Audi applications.

Related reading

This part fits 6 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypeDrive TypeLitersCylindersFuel TypePositionNotes
2016AudiA8 QuattroSedanAWD3.0LV6DIESELN/AWithout Mounting Material; In-Line
2016AudiQ5Sport UtilityAWD3.0LV6DIESELN/AWithout Mounting Material; In-Line
2015AudiQ5Sport UtilityAWD3.0LV6DIESELN/AWithout Mounting Material; In-Line
2015AudiQ7Sport UtilityAWD3.0LV6DIESELN/AWithout Mounting Material; In-Line
2014AudiA6 QuattroSedanAWD3.0LV6DIESELN/AWithout Mounting Material; In-Line; To 04/2014
2014AudiQ5Sport UtilityAWD3.0LV6DIESELN/AWithout Mounting Material; In-Line
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
8T0127401A308412WF8412