Genuine Mercury Oxygen Sensors

Oxygen O2 Sensor

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88 Oxygen Sensors found

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Mercury Sensor - Hego
Part Number: XL3Z-9F472-AA
$67.32 MSRP: $111.27
You Save: $43.95 (40%)
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Product Specifications
- Position: Driver Side
Fits the following Mercury Models:
- Monterey | 2004-2007 | 6 Cyl 3.9L OHV EFI NA, 6 Cyl 4.2L OHV EFI | 4AT AX4N, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
- 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 Sensor - Exhaust Gas - Oxygen
Part Number: BE5Z-9G444-B
$68.15 MSRP: $120.00
You Save: $51.85 (44%)
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Product Specifications
- Manufacturer Note: Rear
- Position: Lower
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 Sensor - Exhaust Gas - Oxygen
Part Number: BH6Z-9G444-A
$70.29 MSRP: $116.18
You Save: $45.89 (40%)
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Product Specifications
- Position: Lower
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 Sensor Assembly
Part Number: F85Z-9G444-BA
$62.35 MSRP: $85.20
You Save: $22.85 (27%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor Assy
- Position: Driver Side
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 Sensor - Hego
Part Number: 5L8Z-9F472-BA
$48.45 MSRP: $77.27
You Save: $28.82 (38%)
Ships in 1 Business Day
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Product Specifications
- Manufacturer Note: Rear
- Position: Front
Fits the following Mercury Models:
- Mariner | 2005-2010 | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS) | 4AT CD4E, 5-Speed Manual Transmission, 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), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
- Milan | 2006-2010 | 4 Cyl 2.3L, 4 Cyl 2.5L Duratec HE PFI, 6 Cyl 3.0L DOHC EFI | 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 Sensor - Hego
Part Number: 9E5Z-9F472-E
$88.60 MSRP: $156.00
You Save: $67.40 (44%)
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Product Specifications
- Other Name: Oxygen Sensor, Upper Oxygen Sensor
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 Sensor - Exhaust Gas - Oxygen
Part Number: 5L8Z-9G444-F
$52.25 MSRP: $86.36
You Save: $34.11 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: Rear
- Replaces: 5L8Z-9G444-H, 5L8Z-9G444-J
Fits the following Mercury Models:
- Mariner | 2007-2010 | 6 Cyl 3.0L DOHC EFI Modular, 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 | 2007-2009 | 6 Cyl 3.0L DOHC EFI | 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, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Sensor - Exhaust Gas - Oxygen
Part Number: BE5Z-9G444-C
$65.67 MSRP: $108.55
You Save: $42.88 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lower Oxygen Sensor, Oxygen Sensor
Fits the following Mercury Models:
- Milan | 2011 | 4 Cyl 2.5L Duratec HE PFI | 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 Sensor Assembly
Part Number: YL8Z-9G444-CA
$53.68 MSRP: $88.73
You Save: $35.05 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assy
- Position: Passenger Side
- Replaced by: 5L8Z-9G444-A
Fits the following Mercury Models:
- Mariner | 2005-2006 | 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Sensor - Exhaust Gas - Oxygen
Part Number: BL8Z-9G444-A
$71.50 MSRP: $118.18
You Save: $46.68 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lower Oxygen Sensor, Oxygen Sensor
Fits the following Mercury Models:
- Mariner | 2011 | 4 Cyl 2.5L Duratec (110kW/150PS) | 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 Sensor Assembly
Part Number: F5RZ-9F472-B
$62.18 MSRP: $84.97
You Save: $22.79 (27%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor Assy; Oxygen Sensor
- Replaces: F5RZ-9F472-AA
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 Sensor - Hego
Part Number: XC2Z-9F472-BB
$65.51 MSRP: $130.18
You Save: $64.67 (50%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oxygen Sensor
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 Sensor - Exhaust Gas - Oxygen
Part Number: BE5Z-9G444-D
$48.78 MSRP: $96.91
You Save: $48.13 (50%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oxygen Sensor, Rear Oxygen Sensor
- Manufacturer Note: Rear
- Position: Passenger Side
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 Sensor - Exhaust Gas - Oxygen
Part Number: 5L8Z-9G444-H
$52.25 MSRP: $86.36
You Save: $34.11 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: Rear
- Position: Front
- Replaced by: 5L8Z-9G444-F
Fits the following Mercury Models:
- Mariner | 2007 | 6 Cyl 3.0L DOHC EFI Modular | 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 | 2007-2009 | 6 Cyl 3.0L DOHC EFI | 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, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Sensor - Exhaust Gas - Oxygen
Part Number: 5L8Z-9G444-J
$52.25 MSRP: $86.36
You Save: $34.11 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Position: Front
- Replaced by: 5L8Z-9G444-F
Fits the following Mercury Models:
- Mariner | 2008 | 6 Cyl 3.0L DOHC EFI Modular | 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
View related parts
Mercury Sensor - Exhaust Gas - Oxygen
Part Number: 5L8Z-9G444-G
$53.68 MSRP: $88.73
You Save: $35.05 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: Rear
- Replaced by: 5L8Z-9G444-A
Fits the following Mercury Models:
- Mariner | 2007-2008 | 6 Cyl 3.0L DOHC EFI Modular | 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 Sensor - Hego
Part Number: F4ZZ-9F472-B
$64.82 MSRP: $140.00
You Save: $75.18 (54%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oxygen Sensor
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 Sensor - Hego
Part Number: F5MZ-9F472-DB
$27.89 MSRP: $38.11
You Save: $10.22 (27%)
Ships in 1-2 Business Days
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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 Sensor Assembly
Part Number: XF5Z-9G444-CA
$35.36 MSRP: $48.31
You Save: $12.95 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assy
- Replaced by: XF5Z-9G444-DA
Fits the following Mercury Models:
- Villager | 1999-2000 | 6 Cyl 3.3L | 4AT 4F20E
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Mercury Sensor - Hego
Part Number: XF5Z-9F472-GA
$42.83 MSRP: $58.53
You Save: $15.70 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oxygen Sensor
Fits the following Mercury Models:
- Villager | 1999-2000 | 6 Cyl 3.3L | 4AT 4F20E

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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.