What are the guidelines for troubleshooting Oxygen Sensors (O2S) on Ford Explorer?

Before attributing the oxygen sensor to driveability problems, thorough tests should be carried out. The PCM controls the engine air/fuel ratio through the upstream O2S. The downstream O2S is used in the catalyst monitor system. A working O2S needs good connections, air supply, temperature, and unleaded fuel. HO2S faults are detected by the EEC system through trouble codes. This is done by checking O2S signal voltage with a voltmeter which should range from 100 to 900 millivolts for both sensors. Be careful during sensor removal so as not to damage it, get it dirty, or use cleaning solvents. Install an anti-seize compound on the threads before screwing in the sensor. Lifting the vehicle up is part of the removal process, then comes detaching the electrical connector, unscrewing the old sensor using a specialized socket, applying anti-seize compound, tightening a new sensor safely and finally connecting the electrical connector.

Genuine Ford Explorer Oxygen Sensors

Oxygen O2 Sensor

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29 Oxygen Sensors found

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Ford Explorer Sensor - Hego
Part Number: XL3Z-9F472-AA
$67.32 MSRP: $111.27
You Save: $43.95 (40%)
ADD TO CART
Product Specifications
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2010 Ford Explorer | 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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Ford Explorer Sensor - Exhaust Gas - Oxygen
Part Number: BE5Z-9G444-B
$62.70 MSRP: $112.73
You Save: $50.03 (45%)
ADD TO CART
Product Specifications
- Manufacturer Note: Rear
- Position: Lower
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2015 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT, 6 Cyl 3.7L DOHC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Sensor - Exhaust Gas - Oxygen
Part Number: BH6Z-9G444-A
$75.90 MSRP: $125.45
You Save: $49.55 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Position: Lower
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2019 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT, 6 Cyl 3.5L DOHC T/C | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Sensor Assembly
Part Number: F85Z-9G444-BA
$61.27 MSRP: $83.72
You Save: $22.45 (27%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Sensor Assy
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2010 Ford Explorer | 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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Ford Explorer Sensor Assembly
Part Number: F8TZ-9G444-CA
$105.23 MSRP: $209.09
You Save: $103.86 (50%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assy; Oxygen Sensor, Rear Oxygen Sensor
- Replaces: F7TZ-9G444-CA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1996-2001 Ford Explorer | 6 Cyl 4.0L | 4AT 4R55E, 4AT 4R70W, 5AT 5R55E, 5MT
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Ford Explorer Sensor - Hego
Part Number: 8F9Z-9F472-H
$83.33 MSRP: $135.27
You Save: $51.94 (39%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2019 Ford Explorer | 6 Cyl 3.5L DOHC T/C | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Sensor - Hego
Part Number: BL3Z-9F472-A
$148.50 MSRP: $245.45
You Save: $96.95 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012-2015 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT, 6 Cyl 3.7L DOHC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Exhaust Gas - Oxygen
Part Number: BE5Z-9G444-A
$72.60 MSRP: $120.00
You Save: $47.40 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2015 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT, 6 Cyl 3.7L DOHC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Hego
Part Number: FB5Z-9F472-A
$68.97 MSRP: $114.00
You Save: $45.03 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Manufacturer Note: Front Or Rear
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2019 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT, 6 Cyl 3.7L DOHC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Hego
Part Number: BA5Z-9F472-A
$82.32 MSRP: $133.64
You Save: $51.32 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: Front Or Rear
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2015 Ford Explorer | 4 Cyl 2.0L EcoBoost (240PS) | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Exhaust Gas - Oxygen
Part Number: FL3Z-9G444-A
$56.98 MSRP: $94.18
You Save: $37.20 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Position: Lower
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2019 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT, 6 Cyl 3.7L DOHC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Hego
Part Number: E1GZ-9F472-C
$85.80 MSRP: $141.82
You Save: $56.02 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2019 Ford Explorer | 4 Cyl 2.3L TIVCT DI TC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Exhaust Gas - Oxygen
Part Number: BA5Z-9G444-A
$52.03 MSRP: $86.00
You Save: $33.97 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Manufacturer Note: Rear
- Position: Lower
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2019 Ford Explorer | 6 Cyl 3.5L DOHC T/C | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Hego
Part Number: 9E5Z-9F472-D
$103.29 MSRP: $170.73
You Save: $67.44 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Position: Front And Rear
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Explorer Sensor - Hego
Part Number: XC2Z-9F472-AA
$49.72 MSRP: $82.18
You Save: $32.46 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Position: Passenger Side
- Replaced by: GU2Z-9G444-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2002-2003 Ford Explorer | 6 Cyl 4.0L SOHC EFI, 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)
View related parts
Ford Explorer SENSOR - EXHAUST GAS - OXYGEN
Part Number: JD8Z-9G444-B
$65.78 MSRP: $104.91
You Save: $39.13 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Lower Oxygen Sensor, Oxygen Sensor
- Replaces: JD8Z-9G444-A, DY-1526
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2023 Ford Explorer | 4 Cyl 2.3 L GAS
View related parts
Ford Explorer SENSOR - EXHAUST GAS - OXYGEN
Part Number: L1MZ-9G444-B
$43.92 MSRP: $87.27
You Save: $43.35 (50%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Lower Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2023 Ford Explorer | 6 Cyl 3.0 L GAS
View related parts
Ford Explorer SENSOR - EXHAUST GAS - OXYGEN
Part Number: L1MZ-9G444-A
$55.40 MSRP: $88.36
You Save: $32.96 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Lower Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2023 Ford Explorer | 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV)
View related parts
Ford Explorer SENSOR - HEGO
Part Number: L1MZ-9F472-D
$84.08 MSRP: $167.09
You Save: $83.01 (50%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Oxygen Sensor, Upper Oxygen Sensor
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2023 Ford Explorer | 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV)
View related parts
Ford Explorer Sensor - Hego
Part Number: 8F9Z-9F472-F
$91.85 MSRP: $151.82
You Save: $59.97 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: Front Or Rear
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012 Ford Explorer | 4 Cyl 2.0L EcoBoost (240PS) | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive

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1-20 of 29 Results

Ford Explorer Oxygen Sensors

Ford Explorer cars incorporate oxygen sensors to measure the amount of remaining oxygen in the exhaust gases that are produced by the engine in regulating the air/fuel ratio and reducing the emissions. These oxygen sensors produce a voltage signal in proportion to the concentration of oxygen which is then used by the engine control computer to adjust the timing of the fuel injectors. Usually, today's Explorers come with at least one upstream sensor and one downstream of the catalyst; those with V6 or V8 engines may even have four. The most common is the zirconium dioxide sensor, which is placed in the exhaust manifold and heated, to achieve a faster response time. There may be new models which have wideband air / fuel ratio sensors that supply a wider range of information than the conventional narrow band sensors. Both types can also be contaminated, or degrade over time and age which results in increased emission and low fuel efficiency if the vehicle is not well maintained.

We provide a wide range of Ford Explorer Oxygen Sensors at the best prices possible. If you need Ford Explorer Oxygen Sensors, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Ford Explorer Oxygen Sensors Parts Questions & Experts Answers

Sensor Assembly
F8TZ-9G444-CA
Q: What are the guidelines for troubleshooting Oxygen Sensors (O2S) on Ford Explorer?
A: Before attributing the oxygen sensor to driveability problems, thorough tests should be carried out. The PCM controls the engine air/fuel ratio through the upstream O2S. The downstream O2S is used in the catalyst monitor system. A working O2S needs good connections, air supply, temperature, and unleaded fuel. HO2S faults are detected by the EEC system through trouble codes. This is done by checking O2S signal voltage with a voltmeter which should range from 100 to 900 millivolts for both sensors. Be careful during sensor removal so as not to damage it, get it dirty, or use cleaning solvents. Install an anti-seize compound on the threads before screwing in the sensor. Lifting the vehicle up is part of the removal process, then comes detaching the electrical connector, unscrewing the old sensor using a specialized socket, applying anti-seize compound, tightening a new sensor safely and finally connecting the electrical connector.