Jeep Wrangler: VEHICLE MAINTENANCE / Fuel Filter Replacement — Diesel Engine


Using a fuel filter that does not meet the manufacturer’s filtration and water separating requirements can severely impact fuel system life and reliability. We recommend you use Mopar® Fuel Filter. Must meet 3 micron rating.


  • Diesel fuel will damage blacktop paving surfaces. Drain the filter into an appropriate container.
  • Do not prefill the fuel filter when installing a new fuel filter. There is a possibility debris could be introduced into the fuel filter during this action. It is best to install the filter dry and allow the in-tank lift pump to prime the fuel system.
  1. Ensure engine is turned off.
  2. Remove the fuel filter protective cover to access the fuel filter assembly.

    Jeep Wrangler. Fuel Filter Replacement — Diesel Engine

    1. Retainers
    2. Fuel Filter Protective Cover
  3. Place drain pan under the fuel filter assembly.
  4. Open the water drain valve, and let any accumulated water and fuel drain.
  5. Close the water drain valve.

    Jeep Wrangler. Fuel Filter Replacement — Diesel Engine

    Fuel Filter Assembly

    1. Water Drain Valve

  6. Wipe clean the underside of the filter housing to prevent contamination from entering fuel system during service.

  7. Remove the fuel filter cap and filter from the housing using a socket. Rotate counterclockwise for removal.

    Jeep Wrangler. Fuel Filter Replacement — Diesel Engine

    1. Fuel Filter Cap

    2. Socket Adapter

  8. Remove the used fuel filter cartridge from the cap and dispose of according to your local regulations.

  9. Wipe clean the sealing surfaces of the cap and housing.


    Take care when handling the new fuel filter to prevent contamination from entering the fuel system.

  10. Lubricate o-ring on the cap with clean engine oil.
  11. Install the new fuel filter cartridge onto the cap.
  12. Insert the cap and filter into the housing with clockwise rotation, use a socket to tighten.
  13. After engine start, verify the fuel filter cap does not leak.

    Draining Fuel/Water Separator Filter — Diesel Engine

    The fuel/water separator housing is located inside the left frame rail in front of the fuel tank. The best access to this water drain valve is from under the vehicle...

    Priming If The Engine Has Run Out Of Fuel — Diesel Engine

    WARNING! Do not open the high pressure fuel system with the engine running. Engine operation causes high fuel pressure. High pressure fuel spray can cause serious injury or death...

    Other information:

    Jeep Wrangler 2018-2024 Owners Manual: MANUAL TRANSMISSION — IF EQUIPPED

    WARNING! You or others could be injured if you leave the vehicle unattended without having the parking brake fully applied. The parking brake should always be applied when the driver is not in the vehicle, especially on an incline. CAUTION! Never drive with your foot resting on the clutch pedal, or attempt to hold the vehicle on a hill with the clutch pedal partially engaged, as this will cause abnormal wear on the clutch...

    Jeep Wrangler 2018-2024 Owners Manual: Special Care

    If you drive on salted or dusty roads or if you drive near the ocean, hose off the undercarriage at least once a month. It is important that the drain holes in the lower edges of the doors, rocker panels, and trunk be kept clear and open. If you detect any stone chips or scratches in the paint, touch them up immediately...


    Basic Voice Commands

    The basic Voice Commands below can be given at any point while using your Uconnect system. Push the VR button on the steering wheel. After the beep, say:

    “Cancel” to stop a current voice session. “Help” to hear a list of suggested Voice Commands. “Repeat” to listen to the system prompts again.

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