Genuine Mercury Oxygen Sensors

Oxygen O2 Sensor

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88 Oxygen Sensors found

  • Mercury Oxygen Sensors - BE5Z-9G444-B
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    Mercury Sensor - Exhaust Gas - Oxygen

    Part Number: BE5Z-9G444-B
    • Manufacturer Note: Rear
    • Position: Lower
    $89.04 MSRP: $126.36
    You Save: $37.32 (30%)
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    Fits the following Mercury Models:
    • Mariner | 2011 | 6 Cyl 3.0L OHC Duratec | 4AT 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
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  • Mercury Oxygen Sensors - F85Z-9G444-BA
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    Mercury Sensor Assembly

    Part Number: F85Z-9G444-BA
    • Other Name: Sensor Assy
    • Position: Driver Side
    $31.83 MSRP: $43.49
    You Save: $11.66 (27%)
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    Fits the following Mercury Models:
    • Mountaineer | 2004-2010 | 6 Cyl 4.0L SOHC EFI, 8 Cyl 4.6L, 8 Cyl 4.6L Romeo SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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  • Mercury Oxygen Sensors - 5F9Z-9G444-AB
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    Mercury Sensor - Exhaust Gas - Oxygen

    Part Number: 5F9Z-9G444-AB
    • Position: Driver Side
    • Replaces: 5F9Z-9G444-AA
    $66.88 MSRP: $110.55
    You Save: $43.67 (40%)
    Add to Cart
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    Fits the following Mercury Models:
    • Milan | 2007-2010 | 6 Cyl 3.5L DOHC VCT SMPI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
    • Montego | 2005-2007 | 6 Cyl 3.0L DOHC EFI Modular | 6-Speed Automatic Transaxle - AWF21, CVT Select Shift Transmission, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
    • Sable | 2008-2009 | 6 Cyl 3.5L DOHC VCT SMPI | 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F50, CVT Select Shift Transmission, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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  • Mercury Oxygen Sensors - 9E5Z-9F472-D
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    Mercury Sensor - Hego

    Part Number: 9E5Z-9F472-D
    • Position: Front And Rear
    $86.84 MSRP: $172.55
    You Save: $85.71 (50%)
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    More Info
    Fits the following Mercury Models:
    • Mariner | 2010-2011 | 6 Cyl 3.0L OHC Duratec | 4AT 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
    • Milan | 2010-2011 | 6 Cyl 3.0L OHC Duratec | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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  • Mercury Oxygen Sensors - 8F9Z-9F472-A
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    Mercury Sensor - Hego

    Part Number: 8F9Z-9F472-A
    • Manufacturer Note: Front Or Rear
    • Position: Upper
    $56.76 MSRP: $93.82
    You Save: $37.06 (40%)
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    Fits the following Mercury Models:
    • Sable | 2008-2009 | 6 Cyl 3.5L DOHC VCT SMPI | 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F50, CVT Select Shift Transmission, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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  • Mercury Oxygen Sensors - 9E5Z-9F472-E
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    Mercury Sensor - Hego

    Part Number: 9E5Z-9F472-E
    • Other Name: Oxygen Sensor, Upper Oxygen Sensor
    $119.95 MSRP: $160.91
    You Save: $40.96 (26%)
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    Fits the following Mercury Models:
    • Mariner | 2010-2011 | 4 Cyl 2.5L Duratec (110kW/150PS) | 6-Speed Automatic Transmission 6F Mid-Range, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
    • Milan | 2010-2011 | 4 Cyl 2.5L Duratec HE PFI | 6-Speed Automatic Transmission 6F Mid-Range, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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  • Mercury Oxygen Sensors - BE5Z-9F472-A
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    Mercury Sensor - Hego

    Part Number: BE5Z-9F472-A
    • Other Name: Front Oxygen Sensor, Oxygen Sensor
    • Position: Front
    $52.34 MSRP: $104.00
    You Save: $51.66 (50%)
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    Fits the following Mercury Models:
    • Milan | 2011 | 6 Cyl 3.5L DOHC VCT SMPI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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  • Mercury Oxygen Sensors - BE5Z-9G444-A
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    Mercury Sensor - Exhaust Gas - Oxygen

    Part Number: BE5Z-9G444-A
    • Position: Front
    $76.45 MSRP: $126.36
    You Save: $49.91 (40%)
    Add to Cart
    More Info
    Fits the following Mercury Models:
    • Mariner | 2011 | 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L OHC Duratec | 4AT 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
    • Milan | 2011 | 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L OHC Duratec | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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  • Mercury Oxygen Sensors - XC2Z-9F472-BB
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    Mercury Sensor - Hego

    Part Number: XC2Z-9F472-BB
    • Other Name: Oxygen Sensor
    $65.51 MSRP: $130.18
    You Save: $64.67 (50%)
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    Fits the following Mercury Models:
    • Cougar | 1999-2002 | 4 Cyl 2.0L, 6 Cyl 2.5L | 4AT CD4E, 5MT
    • Mystique | 1999-2000 | 4 Cyl 2.0L, 6 Cyl 2.5L | 4AT CD4E, 5MT
    • Sable | 1999 | 6 Cyl 3.0L | 4AT AX4N, 4AT AX4S
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  • Mercury Oxygen Sensors - BE5Z-9G444-D
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    Mercury Sensor - Exhaust Gas - Oxygen

    Part Number: BE5Z-9G444-D
    • Other Name: Oxygen Sensor, Rear Oxygen Sensor
    • Manufacturer Note: Rear
    $48.76 MSRP: $96.91
    You Save: $48.15 (50%)
    Add to Cart
    More Info
    Fits the following Mercury Models:
    • Milan | 2011 | 6 Cyl 3.0L OHC Duratec | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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  • Mercury Oxygen Sensors - F4ZZ-9F472-B
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    Mercury Sensor - Hego

    Part Number: F4ZZ-9F472-B
    • Other Name: Oxygen Sensor
    $70.46 MSRP: $140.00
    You Save: $69.54 (50%)
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    Fits the following Mercury Models:
    • Cougar | 1999-2002, 1995-1997 | 4 Cyl 2.0L, 6 Cyl 2.5L, 6 Cyl 3.8L, 8 Cyl 4.6L | 4AT, 4AT 4R70W, 4AT AODE, 4AT CD4E, 5MT
    • Grand Marquis | 1995-2006 | 8 Cyl 4.6L | 4AT, 4AT 4R70W, 4AT AODE
    • Mystique | 1995-2000 | 4 Cyl 2.0L, 6 Cyl 2.5L | 4AT CD4E, 5MT
    • Sable | 1995-2005 | 6 Cyl 3.0L, 6 Cyl 3.8L | 4AT 4F50N, 4AT AX4N, 4AT AX4S, 6AT
    • Tracer | 1995-1999 | 4 Cyl 1.8L, 4 Cyl 1.9L, 4 Cyl 2.0L | 4AT 4EAT, 4AT F4E-III, 4AT IF4E, 5MT
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  • Mercury Oxygen Sensors - F5RZ-9F472-B
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    Mercury Sensor Assembly

    Part Number: F5RZ-9F472-B
    • Other Name: Sensor Assy; Oxygen Sensor
    • Replaces: F5RZ-9F472-AA
    $62.18 MSRP: $84.97
    You Save: $22.79 (27%)
    Add to Cart
    More Info
    Fits the following Mercury Models:
    • Cougar | 1999 | 4 Cyl 2.0L, 6 Cyl 2.5L | 4AT CD4E, 5MT
    • Mystique | 1995-1999 | 4 Cyl 2.0L, 6 Cyl 2.5L | 4AT CD4E, 5MT
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  • Mercury Oxygen Sensors - F3XY-9F472-A
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    Mercury Sensor - Hego

    Part Number: F3XY-9F472-A
    • Other Name: Oxygen Sensor
    $57.29 MSRP: $78.28
    You Save: $20.99 (27%)
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    Fits the following Mercury Models:
    • Villager | 1993 | 6 Cyl 3.0L | 4AT 4F20E
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  • Mercury Oxygen Sensors - 5F9Z-9G444-AA
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    Mercury Sensor - Exhaust Gas - Oxygen

    Part Number: 5F9Z-9G444-AA
    • Position: Driver Side
    • Replaced by: 5F9Z-9G444-AB
    $66.88 MSRP: $110.55
    You Save: $43.67 (40%)
    Add to Cart
    More Info
    Fits the following Mercury Models:
    • Montego | 2005 | 6 Cyl 3.0L DOHC EFI Modular | 6-Speed Automatic Transaxle - AWF21, CVT Select Shift Transmission, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
    Less Info
  • Mercury Oxygen Sensors - XF5Z-9G444-CA
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    Mercury Sensor Assembly

    Part Number: XF5Z-9G444-CA
    • Other Name: Sensor Assy
    • Replaced by: XF5Z-9G444-DA
    $40.41 MSRP: $55.21
    You Save: $14.80 (27%)
    Add to Cart
    More Info
    Fits the following Mercury Models:
    • Villager | 1999-2000 | 6 Cyl 3.3L | 4AT 4F20E
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  • Mercury Oxygen Sensors - XF5Z-9F472-GA
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    Mercury Sensor - Hego

    Part Number: XF5Z-9F472-GA
    • Other Name: Oxygen Sensor
    $51.92 MSRP: $70.95
    You Save: $19.03 (27%)
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    Fits the following Mercury Models:
    • Villager | 1999-2000 | 6 Cyl 3.3L | 4AT 4F20E
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  • Mercury Oxygen Sensors - F8XZ9F472CA
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    Mercury Sensor Hego

    Part Number: F8XZ9F472CA
    • Other Name: Sensor - Hego; Oxygen Sensor
    $56.06 MSRP: $76.60
    You Save: $20.54 (27%)
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    Fits the following Mercury Models:
    • Villager | 1998 | 6 Cyl 3.0L | 4AT 4F20E
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  • Mercury Oxygen Sensors - F5RZ-9F472-AA
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    Mercury Sensor Assembly

    Part Number: F5RZ-9F472-AA
    • Other Name: Sensor Assy
    • Manufacturer Note: Sensor assy. (heated oxygen sensor) HO2S #94BB 9F472-BB
    • Replaced by: F5RZ-9F472-B
    $62.18 MSRP: $84.97
    You Save: $22.79 (27%)
    Add to Cart
    More Info
    Fits the following Mercury Models:
    • Mystique | 1995 | 6 Cyl 2.5L | 4AT CD4E, 5MT
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  • Mercury Oxygen Sensors - F7XZ-9F472-FA
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    Mercury Sensor - Hego

    Part Number: F7XZ-9F472-FA
    • Other Name: Oxygen Sensor
    • Manufacturer Note: 1310mm long. Bosch #0-258-005-846, NPN; 226A0-1B014.
    $70.03 MSRP: $95.69
    You Save: $25.66 (27%)
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    Fits the following Mercury Models:
    • Villager | 1996-1997 | 6 Cyl 3.0L | 4AT 4F20E
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  • Mercury Oxygen Sensors - XF5Z-9F472-HA
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    Mercury Sensor - Hego

    Part Number: XF5Z-9F472-HA
    • Replaced by: 1F5Z-9F472-BA
    $73.72 MSRP: $100.74
    You Save: $27.02 (27%)
    Add to Cart
    More Info
    Fits the following Mercury Models:
    • Villager | 1999-2000 | 6 Cyl 3.3L | 4AT 4F20E
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Related Mercury Parts

About Mercury Oxygen Sensors

The role of the oxygen sensor is to effectively control fuel emissions for better engine performance and fuel economy. It analyzes the exhaust fumes and deposits produced by the engine to gather data of the air-fuel ratio. If the ratio is off, the sensor sends feedback to the vehicle's engine control system so the fuel mixture can be adjusted accordingly. Common signs of a faulty Mercury oxygen sensor are unstable idling speeds and a sudden drop in gas mileage.