Mercedes Benz 240D (123.123) Diesel MFI Pump Costs

The average cost for a Mercedes Benz 240D (123.123) Diesel MFI Pump Replacement is between $62 - $115. Get an instant quote with our AI repair estimator.

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What is a Diesel MFI Pump?

The Diesel Multi-Function Injection (MFI) pump is a critical component in diesel engine vehicles. It plays a vital role in delivering fuel to the engine's cylinders at the right time, in the correct quantity, and at the appropriate pressure. The MFI pump ensures that the engine runs smoothly and efficiently by maintaining consistent fuel delivery. This component is crucial for the combustion process within the engine, which powers the vehicle. A properly functioning MFI pump helps in achieving optimal engine performance and fuel efficiency, which is particularly important in diesel engines known for their durability and fuel economy.

Symptoms of a Faulty Diesel MFI Pump

When the Diesel MFI pump starts to fail, several symptoms can manifest, indicating that it's time for a check-up or replacement. One of the most common signs is difficulty starting the engine, as the pump may not be delivering sufficient fuel. Once the vehicle is running, it might experience stalling, as an erratic fuel supply can interrupt ongoing combustion. Another symptom is a noticeable reduction in engine power and acceleration, as the engine isn't getting the fuel it needs to perform optimally. Poor fuel efficiency can also be a symptom, with the engine burning more diesel than usual due to inadequate or uneven fuel delivery. In addition, you might notice increased exhaust smoke, as incomplete combustion from improper fuel delivery leads to excess emissions. Any of these symptoms suggest a potential issue with the MFI pump that requires attention from a professional mechanic.

How urgent is Diesel MFI Pump Repair?

Addressing a faulty Diesel MFI pump is fairly urgent. Delaying the repair can result in more severe engine issues due to uneven fuel delivery, which can lead to engine stalling or even a complete breakdown. Moreover, running the engine with a malfunctioning pump can increase wear and tear on other components, potentially leading to more costly repairs. Therefore, if you notice symptoms like starting difficulties, stalling, or reduced performance, it's important to have the MFI pump inspected and possibly replaced as soon as possible.

How much does Diesel MFI Pump Replacement Cost?

The cost of replacing a Diesel MFI pump can vary significantly depending on the make and model of the vehicle, as well as the complexity of the repair. On average, the replacement cost can range from $500 to $2,000, including parts and labor. Given the precision involved in setting up a new pump, labor costs can be substantial. It's advisable to get a detailed estimate from a qualified mechanic who specializes in diesel engines to understand the exact costs involved for your specific vehicle.

4 FAQs About Diesel MFI Pumps

What causes a Diesel MFI pump to fail?
Several factors can lead to the failure of a Diesel MFI pump. The most common issues include contamination from dirty fuel, wear and tear from prolonged use, and blockages within the fuel system. Lack of regular maintenance can also exacerbate these problems, leading to pump malfunctions.
Can I drive with a faulty Diesel MFI pump?
While it is possible to drive with a faulty MFI pump, it is not advisable. Doing so can lead to further engine damage and increased repair costs. In some cases, you might experience sudden engine stalling, which can be dangerous while driving.
How can I prevent Diesel MFI pump problems?
Preventing issues with your Diesel MFI pump involves regular maintenance of the fuel system. This includes using high-quality diesel fuel, replacing fuel filters at recommended intervals, and having the pump and fuel system inspected regularly to catch any potential issues early.
How long does a Diesel MFI pump typically last?
The lifespan of a Diesel MFI pump can vary depending on driving conditions, maintenance habits, and the quality of fuel used. Generally, these pumps can last anywhere from 100,000 to 150,000 miles if properly maintained. Regular check-ups can help identify potential problems early, extending the life of the pump.

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1983 Mercedes Benz 240D (123.123) L4-2.4L DSL (616.912) - Diesel MFI Pump Costs
Parts: $48.00
Labor: $26.00
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  "partPrice": 48,
  "laborPrice": 26,
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  "alldata_vehicle_id": 46832,
  "title": "Diesel MFI Pump",
  "parts": {
    "qualifiers": [
      {
        "name": "Gasket Injection Pump to Block - Triangular",
        "part": [
          {
            "name": "Gasket Inj.pump To Block, Triangular",
            "price": "3.50",
            "pricecode": "",
            "partnumber": "6150740080"
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        ]
      },
      {
        "name": "Heat Shield Seal",
        "qualifiers": [
          {
            "name": "10MM Orifice",
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          },
          {
            "name": "7.5MM Orifice",
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                "pricecode": "",
                "partnumber": "6170170260"
              }
            ]
          }
        ]
      },
      {
        "name": "Primer Pump",
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          {
            "name": "Primer Pump Assembly",
            "part": [
              {
                "name": "Primer Pump Assembly,",
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                "pricecode": "",
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              }
            ]
          },
          {
            "name": "Primer Pump Piston",
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                "pricecode": "",
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              }
            ]
          }
        ]
      },
      {
        "name": "Rubber Plug - Vacuum Block",
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          {
            "name": "Rubber Plug, Vacuum Block",
            "note": "Mercedes does not advise using this for diesel injector plug. They  now recommended # 403-070-00-55 for this purpose.",
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            "pricecode": "",
            "partnumber": "0009871145"
          }
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                "pricecode": "",
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          },
          {
            "name": "Vacuum Shut-Off Valve",
            "qualifiers": [
              {
                "name": "Pulls Inj. Rack to Stop",
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                    "pricecode": "",
                    "partnumber": "0000702053"
                  }
                ]
              }
            ]
          },
          {
            "name": "Valve Vacuum at Steering - For Diesel Shut-Off",
            "part": [
              {
                "name": "Valve Vacuum At Steering, For Diesel Shut-off",
                "price": "17.00",
                "pricecode": "",
                "partnumber": "0004600284"
              }
            ]
          }
        ]
      },
      {
        "name": "Vacuum Valve",
        "qualifiers": [
          {
            "name": "With Trans.# 123 270 30 01",
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              {
                "name": "Transmission 722.117: From Series 030016",
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        ]
      },
      {
        "name": "Vacuum Valve Kit",
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          }
        ]
      }
    ]
  },
  "labors": {
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      {
        "operation": "Replace",
        "qualifiers": [
          {
            "name": "Fuel Injection Components, Renew",
            "labor": {
              "skill": "B",
              "standardtime": "3.1",
              "warrantytime": "2.2"
            },
            "qualifiers": []
          },
          {
            "name": "Pump Check Valve",
            "qualifiers": [
              {
                "name": "One",
                "labor": {
                  "skill": "B",
                  "standardtime": "0.6",
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                "qualifiers": []
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      },
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        "operation": "Diagnose/Test",
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          }
        ]
      },
      {
        "operation": "Adjust",
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            "name": "Timing Adjust",
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        ]
      }
    ]
  },
  "year": 1983,
  "make": "Mercedes Benz",
  "model": "240D (123.123)",
  "engine": "L4-2.4L DSL (616.912)"
}
1982 Mercedes Benz 240D (123.123) L4-2.4L DSL (616.912) - Diesel MFI Pump Costs
Parts: $38.00
Labor: $62.00
{
  "partPrice": 38,
  "laborPrice": 62,
  "alldata_id": 46831,
  "alldata_vehicle_id": 46831,
  "title": "Diesel MFI Pump",
  "parts": {
    "qualifiers": [
      {
        "name": "Gasket Injection Pump to Block - Triangular",
        "part": [
          {
            "name": "Gasket Inj.pump To Block, Triangular",
            "price": "3.50",
            "pricecode": "",
            "partnumber": "6150740080"
          }
        ]
      },
      {
        "name": "Heat Shield Seal",
        "qualifiers": [
          {
            "name": "10MM Orifice",
            "part": [
              {
                "name": "Heat Shield Seal, 10mm Orifice",
                "price": "4.70",
                "pricecode": "",
                "partnumber": "6170170360"
              }
            ]
          },
          {
            "name": "7.5MM Orifice",
            "part": [
              {
                "name": "Heat Shield Seal, 7.5mm Orifice",
                "price": "3.70",
                "pricecode": "",
                "partnumber": "6170170260"
              }
            ]
          }
        ]
      },
      {
        "name": "Primer Pump",
        "qualifiers": [
          {
            "name": "Primer Pump Assembly",
            "part": [
              {
                "name": "Primer Pump Assembly,",
                "note": "Bosch 0.440.017.023",
                "price": "0.00",
                "pricecode": "",
                "partnumber": "0020914501"
              }
            ]
          },
          {
            "name": "Primer Pump Piston",
            "part": [
              {
                "name": "Primer Pump Piston,",
                "note": "Bosch 2.447.010.009",
                "price": "32.50",
                "pricecode": "",
                "partnumber": "0000900050"
              }
            ]
          }
        ]
      },
      {
        "name": "Rubber Plug - Vacuum Block",
        "part": [
          {
            "name": "Rubber Plug, Vacuum Block",
            "note": "Mercedes does not advise using this for diesel injector plug. They  now recommended # 403-070-00-55 for this purpose.",
            "price": "2.70",
            "pricecode": "",
            "partnumber": "0009871145"
          }
        ]
      },
      {
        "name": "Shut Off Valve",
        "qualifiers": [
          {
            "name": "Gasket on Vacuum Shut-Off - Use With 000-070-20-53",
            "part": [
              {
                "name": "Gasket On Vac. Shut-off, Use W/000-070-20-53",
                "note": "Bosch 1.420.113.002",
                "price": "4.20",
                "pricecode": "",
                "partnumber": "0000743680"
              }
            ]
          },
          {
            "name": "Vacuum Shut-Off Valve",
            "qualifiers": [
              {
                "name": "Pulls Inj. Rack to Stop",
                "part": [
                  {
                    "name": "Vacuum Shut-off Valve, Pulls Inj. Rack To Stop",
                    "note": "Bosch 1.427.133.091  Effbe 8440",
                    "price": "194.00",
                    "pricecode": "",
                    "partnumber": "0000702053"
                  }
                ]
              }
            ]
          },
          {
            "name": "Valve Vacuum at Steering - For Diesel Shut-Off",
            "part": [
              {
                "name": "Valve Vacuum At Steering, For Diesel Shut-off",
                "price": "17.00",
                "pricecode": "",
                "partnumber": "0004600284"
              }
            ]
          }
        ]
      },
      {
        "name": "Vacuum Valve",
        "qualifiers": [
          {
            "name": "With Trans.# 123 270 30 01",
            "qualifiers": [
              {
                "name": "Transmission 722.117: From Series 030016",
                "part": [
                  {
                    "name": "Vacuum Valve,",
                    "note": "Mounts on injection pump and supplies vacuum/pressure to the shift  modulator on the transmission.  see also # 002-997-53-36 for 2/3 vacuum valve.",
                    "price": "105.00",
                    "pricecode": "",
                    "partnumber": "1230700046"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "name": "Vacuum Valve Kit",
        "part": [
          {
            "name": "Vacuum Valve Kit,",
            "price": "37.50",
            "pricecode": "",
            "partnumber": "0005864043"
          }
        ]
      }
    ]
  },
  "labors": {
    "operations": [
      {
        "operation": "Replace",
        "qualifiers": [
          {
            "name": "Fuel Injection Components, Renew",
            "labor": {
              "skill": "B",
              "standardtime": "3.1",
              "warrantytime": "2.2"
            },
            "qualifiers": []
          },
          {
            "name": "Pump Check Valve",
            "qualifiers": [
              {
                "name": "One",
                "labor": {
                  "skill": "B",
                  "standardtime": "0.6",
                  "warrantytime": "0.0"
                },
                "qualifiers": []
              },
              {
                "name": "Both",
                "labor": {
                  "skill": "B",
                  "standardtime": "1.0",
                  "warrantytime": "0.0"
                },
                "qualifiers": []
              }
            ]
          }
        ]
      },
      {
        "operation": "Diagnose/Test",
        "qualifiers": [
          {
            "name": "Timing Test",
            "labor": {
              "skill": "B",
              "standardtime": "1.7",
              "warrantytime": "0.0"
            }
          }
        ]
      },
      {
        "operation": "Adjust",
        "qualifiers": [
          {
            "name": "Timing Adjust",
            "labor": {
              "skill": "B",
              "standardtime": "0.7",
              "warrantytime": "0.4"
            }
          }
        ]
      }
    ]
  },
  "year": 1982,
  "make": "Mercedes Benz",
  "model": "240D (123.123)",
  "engine": "L4-2.4L DSL (616.912)"
}

Mercedes Benz 240D (123.123) Diesel MFI Pump Costs

What is a Diesel MFI Pump?

Symptoms of a Faulty Diesel MFI Pump

How urgent is Diesel MFI Pump Repair?

How much does Diesel MFI Pump Replacement Cost?

4 FAQs About Diesel MFI Pumps

Related Repairs

Featured Articles

We’re here to keep you moving.

Dev Output

1983 Mercedes Benz 240D (123.123) L4-2.4L DSL (616.912) - Diesel MFI Pump Costs

1982 Mercedes Benz 240D (123.123) L4-2.4L DSL (616.912) - Diesel MFI Pump Costs