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Mercury BE5Z-9G444-B Lower Oxygen Sensor

2011 Mercury Mariner BE5Z9G444B

Customer Questions & Expert Answers (3)
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BE5Z-9G444-B Ford Lower Oxygen Sensor Product Photo 1 of 4
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BE5Z-9G444-B Ford Lower Oxygen Sensor Illustration 1 of 1
  • Part Description
    Sensor - Exhaust Gas - Oxygen
  • Base No.
    9G444
  • Position
    Passenger Side
  • Manufacturer
    Ford
Make sure this part fits
$80.86 MSRP: $114.76
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  • Specifications
  • Fitment
  • Q&A

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  • Product Specifications

    BrandGenuine Mercury
    Base No.9G444
    Manufacturer Part NumberBE5Z-9G444-B, BE5Z9G444B
    Part DescriptionLower Oxygen Sensor; Sensor - Exhaust Gas - Oxygen
    Manufacturer NoteRear
    Item Dimensions8.6 x 7.6 x 7.7 inches
    Item Weight0.50 Pounds
    PositionPassenger Side
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerFord
    SKUBE5Z-9G444-B
    WarrantyThis genuine Ford part is guaranteed by Ford's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65

  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2011 Mercury Mariner6 Cyl 3.0L OHC Duratec4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive

  • Customer Questions & Expert Answers

    Q:
    Can you tell me if this part is correct for my car?
    A:
    You can Select Your Vehicle to check if BE5Z-9G444-B fits your vehicle.
    Posted and answered by Ford Parts Specialist Rick
    Q:
    What are the Oxygen Sensor for the 2011 Ford Escape? Posted by Nevzat G.
    A:
    An oxygen sensor is a galvanic battery that produces a very small voltage output in response to the amount of oxygen in the exhaust gases. This voltage signal is the "input" side of the feedback loop between the oxygen sensor and the Powertrain Control Module (PCM). You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist John / Jan 06, 2025
    Q:
    Why might Oxygen Sensor be difficult to loosen when the engine is cold for the 2014 Ford Taurus? Posted by Kalom E.
    A:
    Because it is installed in the exhaust manifold or pipe, both of which contract when cool. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist George / Jan 19, 2025

Genuine Ford Part BE5Z-9G444-B, the Right Choice

To ensure reliability, purchase part # BE5Z-9G444-B Lower Oxygen Sensor. It is also called Oxygen Sensor. OEM parts are of high quality and known for their longevity. This is because they are built to the Ford standards which are relatively high and undergo rigorous quality control testing. This part fits specific Mercury Mariner models.

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