How to safely and effectively service the Heated Oxygen Sensor (HO2S) on Mercury Grand Marquis?

First service the heated oxygen sensor (HO2S) after deactivating the fire suppression system because it protects from severe personal injury. Place the vehicle on a hoist system while it is at neutral position. Disconnect the HO2S electrical connector. The insertion of penetrating and lock lubricant to sensor threads will help removal by acting as a lubricant. A torque wrench setting based calculation must be performed when installing the HO2S by using the exhaust gas oxygen sensor socket and its associated tool. The correct torque setting for an HO2S installation should reach 40 Nm while using anti-seize lubricant on the threads. It is vital to wait for repowering the vehicle after system installation to comply with all safety warnings and procedures when the vehicle utilizes a fire suppression system.

OEM Mercury Grand Marquis Oxygen Sensor

Oxygen O2 Sensor

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6 Oxygen Sensors found

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Mercury Grand Marquis Oxygen Sensor, Rear Driver Side Part Number: GU2Z-9G444-A
$57.57 MSRP: $94.73
You Save: $37.16 (40%)
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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:
- 1990-2011 Mercury Grand Marquis | GS, LS | 4.6L V8, 5.0L V8
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Mercury Grand Marquis Oxygen Sensor Part Number: F8VZ-9F472-BA
$71.28 MSRP: $98.60
You Save: $27.32 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor - Hego
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2002 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Oxygen Sensor Part Number: F5MZ-9F472-B
$58.92 MSRP: $98.73
You Save: $39.81 (41%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1996-1997 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Oxygen Sensor Part Number: F4ZZ-9F472-B
$92.79 MSRP: $128.36
You Save: $35.57 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Hego
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS
View related parts
Mercury Grand Marquis Oxygen Sensor Part Number: F8VZ-9F472-AA
Product Specifications
- Other Name: Sensor - Hego
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-1999 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS
View related parts
Mercury Grand Marquis Oxygen Sensor Part Number: FO3Z-9F472-A
Product Specifications
- Other Name: Sensor - Hego; Exhaust Temperature Sensor
- Replaces: FOPZ-9F472-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1991 Mercury Grand Marquis | GS, LS | 8 Cyl 5.0 L GAS

Mercury Grand Marquis Oxygen Sensor

OEM Oxygen Sensor boasts unmatched quality. Each part goes through full quality checks. They adhere to Mercury'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 Mercury Grand Marquis parts. We keep a wide inventory of OEM Grand Marquis 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.

Mercury Grand Marquis Oxygen Sensor Parts and Q&A

Oxygen Sensor, Rear Driver Side
GU2Z-9G444-A
Q: How to safely and effectively service the Heated Oxygen Sensor (HO2S) on Mercury Grand Marquis?
A:
First service the heated oxygen sensor (HO2S) after deactivating the fire suppression system because it protects from severe personal injury. Place the vehicle on a hoist system while it is at neutral position. Disconnect the HO2S electrical connector. The insertion of penetrating and lock lubricant to sensor threads will help removal by acting as a lubricant. A torque wrench setting based calculation must be performed when installing the HO2S by using the exhaust gas oxygen sensor socket and its associated tool. The correct torque setting for an HO2S installation should reach 40 Nm while using anti-seize lubricant on the threads. It is vital to wait for repowering the vehicle after system installation to comply with all safety warnings and procedures when the vehicle utilizes a fire suppression system.