Nox sensors replacement + regen - 10 hours of labor??

Discussion in 'Freightliner Forum' started by Lazar181, Aug 4, 2025.

  1. Lazar181

    Lazar181 Bobtail Member

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    Aug 4, 2025
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    Hi guys,

    I’m stuck at the Freightliner dealership as my truck went into derate due to faulty Nox sensors. These guys are charging me 10 hours of labor for nox sensors replacement and regen… Is this normal?? Other forums mention that it takes 1.5-2 hrs to replace them and up to 1hrs for regen
     
    cascadia4life Thanks this.
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  3. 062

    062 Road Train Member

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    Need to know what engine and what the codes were.
     
  4. Goodysnap

    Goodysnap Road Train Member

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    How much of the 10 hrs is for diag? Ask for a breakdown of the time.
     
    AModelCat and wore out Thank this.
  5. xramex

    xramex Bobtail Member

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    Jan 1, 2023
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    You are getting ripoff. Took me like 30 mins to replace my outlet Nox Sensor and that is including watching the Step by step tutorial on Youtube. The Inlet doesn't look look like to much work either. I say 3h max including regen.
     
    cascadia4life Thanks this.
  6. 062

    062 Road Train Member

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    Changing the sensor generally doesn’t take too long. If it’s a Detroit and they followed all the troubleshooting steps,then it can take time.
     
  7. Antinomian

    Antinomian Road Train Member

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    Depends on how hard it was to get out. Sometimes they have to cut the bung off and weld a new one on.
     
    cascadia4life and AModelCat Thank this.
  8. AModelCat

    AModelCat Road Train Member

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    If the sensor broke off that'll be where the time went. Flat rate and book times are a very general guide and go out the window in less than ideal scenarios.
     
  9. OlegMel

    OlegMel Medium Load Member

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    Apr 8, 2023
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    Diagnostic fee, 2 hours, nox sensors replacement 1.4hours, regen 1 hour. When nox sensors go out there’s usually a circuit or inefficiency codes. They’re not that difficult to diagnose. A lot of dealers these days like to charge 2 hours for “laptop hookup to read the codes” then they start with their tests. Sounds like these scum bags are taking advantage of you
     
  10. cascadia4life

    cascadia4life Bobtail Member

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    Apr 21, 2023
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    Yeah.... 10 hours for nox sensors. .. Poor guy. Feels like a ripoff. But still not cheap. Nox sensor plus Regen.... That's like 2500$ USD?
     
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