How to Service the Heated Oxygen Sensor on Ford Explorer?

Place the vehicle on a hoist and set neutral before beginning service of the heated oxygen sensor (HO2S). The RH HO2S requires removal of two bolts before setting the heat shield to the side. First disconnect the HO2S electrical connector then apply penetrating and lock lubricant on the connector when needed to aid removal. You must use the exhaust gas oxygen sensor socket to uninstall the oxygen sensor known as HO2S. Before installation you must apply nickel anti-seize lubricant lightly to the threads of the new HO2S before tightening it to 41 Nm (30 lb-ft) using the original socket. Reinstall the HO2S electrical connector afterward before placing the heat shield if needed and fastening it with its 2 bolts at 20 Nm (177 lb-in) torque.

OEM Ford Explorer Oxygen Sensor

Oxygen O2 Sensor

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36 Oxygen Sensors found

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Ford Explorer Oxygen Sensor, Front Passenger Side Part Number: 8F9Z-9F472-H
$86.74 MSRP: $142.73
You Save: $55.99 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front, Front Left, Front Right; Wideband Air/Fuel Sensor; Air/Fuel Sensor; Front Oxygen Sensor; Upper Oxygen Sensor
- Position: Front Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2019 Ford Explorer | Platinum, Sport | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Rear Driver Side Part Number: GU2Z-9G444-A
$57.57 MSRP: $94.73
You Save: $37.16 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Front, Front Left, Front Right, Rear, Rear Left, Rear Right
- Position: Rear Driver Side
- Replaces: F1TZ-9F472-A, F85Z-9G444-AA, F88Z-9F472-AA, 1R3Z-9G444-AA, 1R3Z-9G444-BA, DY-1081, F4DZ-9F472-A, 5C5Z-9F472-AA, 5C5Z-9F472-BA, 5F9Z-9G444-BA, 5W6Z-9G444-BA, 6E5Z-9G444-AA, F85Z-9G444-AB, F85Z-9G444-E, F88Z-9F472-AB, 6L7Z-9F472-BA, 5W6Z-9G444-AA, DY-1091, DY-1086, DY-1087, DY-1053, DY-1060, DY-800, DY-831, DY-832, DY-1034, DY-661, DY-731, DY-1040, F4SZ-9F472-A, DY-1057, DY-1104, DY-1039, F1SZ-9F472-B, DY-1038, DY-1089, DY-1093, DY-649, DY-1063, DY-1005, DY-761, F1SZ-9F472-A, DY-703, F3UZ-9F472-A, F4ZZ-9F472-C, F5AZ-9G444-B, F4SZ-9F472-D, F6DZ-9G444-B, F4UZ-9F472-A, F5UZ-9F472-A, F4DZ-9F472-B, F78Z-9F472-AA, F7RZ-9G444-BA, F75Z-9G444-AA, F5WZ-9F472-BA, F6DZ-9G444-AA, F88Z-9F472-BA, F75Z-9G444-BA, F77Z-9F472-BA, F8RZ-9G444-BB, F5MZ-9F472-AA, F78Z-9F472-BA, DY-1058, F6DZ-9G444-EA, FOTZ-9F472-A, XR3Z-9G444-EA, XC2Z-9F472-BA, XR3Z-9G444-JA, XR3Z-9G444-HA, XR3Z-9G444-BB, XC2Z-9F472-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1996-2010 Ford Explorer | Base, Eddie Bauer, Elite, Limited, Mercury Luxury, Mercury Premier, Mountaineer Version, NBX, Postal, Sport, XL, XL Fleet, XLS, XLS Sport, XLT, XLT Sport | 4.0L V6, 4.6L V8, 5.0L V8, 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS
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Ford Explorer Oxygen Sensor, Rear Driver Side Part Number: BE5Z-9G444-A
$81.11 MSRP: $133.45
You Save: $52.34 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Rear, Rear Left, Rear Right; Rear Oxygen Sensor; Lower Oxygen Sensor
- Position: Rear Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2015 Ford Explorer | Base, Limited, XLT | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Rear Part Number: F8TZ-9G444-CA
$98.64 MSRP: $201.82
You Save: $103.18 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly; Oxygen Sensor, Rear; Rear Oxygen Sensor
- Position: Rear
- Replaces: F7TZ-9G444-CA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1996-2000 Ford Explorer | Eddie Bauer, Limited, Postal, Sport, XL, XL Fleet, XLS, XLT | 6 Cyl 4.0 L GAS
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Ford Explorer Oxygen Sensor, Rear Part Number: FL3Z-9G444-A
$65.20 MSRP: $107.27
You Save: $42.07 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Rear; Rear Oxygen Sensor; Lower Oxygen Sensor
- Position: Rear
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2019 Ford Explorer | Base, Limited, XLT | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Rear Lower Passenger Side Part Number: BA5Z-9G444-A
$67.52 MSRP: $111.09
You Save: $43.57 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Rear Right; Rear Oxygen Sensor; Lower Oxygen Sensor
- Manufacturer Note: Rear
- Position: Rear Lower Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2019 Ford Explorer | Platinum, Sport | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Front Part Number: FB5Z-9F472-A
$66.30 MSRP: $109.09
You Save: $42.79 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front, Front Left, Front Right; Wideband Air/Fuel Sensor; Air/Fuel Sensor; Front Oxygen Sensor; Upper Oxygen Sensor
- Manufacturer Note: Front Or Rear
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2019 Ford Explorer | Base, Limited, XLT | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Rear Driver Side Part Number: BH6Z-9G444-A
$72.49 MSRP: $119.27
You Save: $46.78 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Rear, Rear Left; Rear Oxygen Sensor; Lower Oxygen Sensor
- Position: Rear Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2019 Ford Explorer | Base, Limited, Platinum, Sport, XLT | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Front Passenger Side Part Number: XL3Z-9F472-AA
$66.52 MSRP: $109.45
You Save: $42.93 (40%)
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front, Front Right; Rear Oxygen Sensor; Front Oxygen Sensor
- Position: Front Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2010, 1999-2001 Ford Explorer | Eddie Bauer, Limited, NBX, Postal, Sport, XL, XL Fleet, XLS, XLT, XLT Sport | 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS
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Ford Explorer Oxygen Sensor, Front Part Number: E1GZ-9F472-C
$87.18 MSRP: $143.45
You Save: $56.27 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front; Wideband Air/Fuel Sensor; Front Oxygen Sensor; Upper Oxygen Sensor
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2019 Ford Explorer | Base, Limited, XLT | 4 Cyl 2.3 L GAS
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Ford Explorer Oxygen Sensor, Front Part Number: BA5Z-9F472-A
$89.95 MSRP: $148.00
You Save: $58.05 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front; Wideband Air/Fuel Sensor; Front Oxygen Sensor; Upper Oxygen Sensor
- Manufacturer Note: Front Or Rear
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2015 Ford Explorer | Base, Limited, XLT | 4 Cyl 2.0 L GAS
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Ford Explorer Oxygen Sensor, Front Part Number: BL3Z-9F472-A
$155.81 MSRP: $256.36
You Save: $100.55 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front, Front Right; Wideband Air/Fuel Sensor; Air/Fuel Sensor; Front Oxygen Sensor; Upper Oxygen Sensor
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012-2015 Ford Explorer | Base, Limited, XLT | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Rear Part Number: BB5Z-9G444-A
$159.12 MSRP: $261.82
You Save: $102.70 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Rear; Lower Oxygen Sensor
- Manufacturer Note: Rear
- Position: Rear
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012-2015 Ford Explorer | Base, Limited, XLT | 4 Cyl 2.0 L GAS
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Ford Explorer Oxygen Sensor, Front Driver Side Part Number: XL3Z-9F472-BA
$48.89 MSRP: $77.64
You Save: $28.75 (38%)
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front, Front Left; Front Oxygen Sensor
- Position: Front Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2001 Ford Explorer | Eddie Bauer, Limited, Postal, Sport, XL, XL Fleet, XLS, XLT | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS
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Ford Explorer Oxygen Sensor, Front Part Number: 9E5Z-9F472-D
$113.82 MSRP: $187.27
You Save: $73.45 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front; Wideband Air/Fuel Sensor; Air/Fuel Sensor; Front Oxygen Sensor; Upper Oxygen Sensor
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Ford Explorer | Base, Limited, XLT | 6 Cyl 3.5 L GAS
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Ford Explorer Oxygen Sensor, Front Part Number: 8F9Z-9F472-F
$94.87 MSRP: $159.27
You Save: $64.40 (41%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front; Wideband Air/Fuel Sensor; Front Oxygen Sensor; Upper Oxygen Sensor
- Manufacturer Note: Front Or Rear
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012 Ford Explorer | Base, Limited, XLT | 4 Cyl 2.0 L GAS
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Ford Explorer Oxygen Sensor, Rear Part Number: L1MZ-9G444-A
$64.66 MSRP: $106.40
You Save: $41.74 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Rear; Lower Oxygen Sensor
- Position: Rear
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2023 Ford Explorer | Base, Limited Hybrid, Platinum Hybrid | 6 Cyl 3.3 L FLEX, 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV)
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Ford Explorer Oxygen Sensor Part Number: L1MZ-9G444-B
$73.70 MSRP: $121.27
You Save: $47.57 (40%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Lower Oxygen Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2024 Ford Explorer | King Ranch, Platinum, ST | 6 Cyl 3.0 L GAS
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Ford Explorer Oxygen Sensor, Front Driver Side Part Number: L1MZ-9F472-E
$96.63 MSRP: $159.00
You Save: $62.37 (40%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego; Oxygen Sensor, Front; Upper Oxygen Sensor
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2024 Ford Explorer | Base, Limited, ST-Line, Timberline, XLT | 4 Cyl 2.3 L GAS
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Ford Explorer Oxygen Sensor, Rear Lower Part Number: BE5Z-9G444-B
$84.04 MSRP: $133.45
You Save: $49.41 (38%)
Product Specifications
- Other Name: Sensor - Exhaust Gas - Oxygen; Oxygen Sensor, Rear Left, Rear Right; Rear Oxygen Sensor; Lower Oxygen Sensor
- Manufacturer Note: Rear
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2015 Ford Explorer | Base, Limited, XLT | 6 Cyl 3.5 L GAS

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Ford Explorer Oxygen Sensor

OEM Oxygen Sensor boasts unmatched quality. Each part goes through full quality checks. They adhere to Ford's official factory standards. These steps remove flaws and inconsistencies. So you can get Oxygen Sensor with long life and a perfect fit. Come to our website and find genuine Ford Explorer parts. We keep a wide inventory of OEM Explorer parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

The Oxygen Sensor of the Ford Explorer, which detects how much unburned oxygen is in the exhaust gases, sends a voltage signal to the engine control computer so that it can adjust the fuel mixture for low emissions. The zirconium dioxide element is surrounded by a ceramic enclosure with platinum electrodes inside. The element is further protected by a threaded steel shell that screws into the exhaust. The slots allow the exhaust gas to reach the tip. The top vents let outside air through. To approximately 600°F, the Oxygen Sensor's internal heater quickly heats up. The resultant movement of oxygen ions in the zirconium oxide causes a corresponding voltage to be produced. This voltage counts up to 0.9 volts for a rich mixture and drops to 0.1 volts for a lean mixture. The typical Ford Explorer contains at least two different Oxygen Sensor units, one pre-catalytic converter and one post-catalytic converter. Models with V6 or V8 layouts are likely to use four to represent both cylinder banks. The upstream Oxygen Sensor goes rich and lean several times a second while the downstream sensor oscillates around 0.45 volts to verify the efficiency of the converter. The presence of coolant, oil, carbon, or any other type of additives can impede the response rate, increase emissions, trigger error codes, and turn on the check engine light. An Oxygen Sensor helps owners enjoy a Ford Explorer and meets the specifications for exploring.

Ford Explorer Oxygen Sensor Parts and Q&A

Oxygen Sensor, Rear Driver Side
GU2Z-9G444-A
Q: How to Service the Heated Oxygen Sensor on Ford Explorer?
A:
Place the vehicle on a hoist and set neutral before beginning service of the heated oxygen sensor (HO2S). The RH HO2S requires removal of two bolts before setting the heat shield to the side. First disconnect the HO2S electrical connector then apply penetrating and lock lubricant on the connector when needed to aid removal. You must use the exhaust gas oxygen sensor socket to uninstall the oxygen sensor known as HO2S. Before installation you must apply nickel anti-seize lubricant lightly to the threads of the new HO2S before tightening it to 41 Nm (30 lb-ft) using the original socket. Reinstall the HO2S electrical connector afterward before placing the heat shield if needed and fastening it with its 2 bolts at 20 Nm (177 lb-in) torque.