How to safely and effectively service the Heated Oxygen Sensors (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 Sensors

Oxygen O2 Sensor

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6 Oxygen Sensors found

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Mercury Grand Marquis Oxygen Sensor
Part Number: F8VZ-9F472-BA
$57.02 MSRP: $78.88
You Save: $21.86 (28%)
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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, Rear Driver Side
Part Number: GU2Z-9G444-A
$56.02 MSRP: $92.18
You Save: $36.16 (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; Rear Oxygen Sensor; Front Oxygen Sensor; Upper Oxygen Sensor; Lower Oxygen Sensor; Sensor
- Position: Rear Driver Side
- Replaces: 1R3Z-9G444-BA, 1R3Z-9G444-AA, 5F9Z-9G444-BA, 5W6Z-9G444-BA, 5C5Z-9F472-AA, DY-1091, DY-1005, DY-1063, DY-1089, DY-649, DY-1086, DY-1104, F1TZ-9F472-A, F4DZ-9F472-A, F6DZ-9G444-AA, F88Z-9F472-AA, F78Z-9F472-BA, F75Z-9G444-BA, DY-1081, DY-1060, DY-800, DY-831, DY-832, F3UZ-9F472-A, F4DZ-9F472-B, F4ZZ-9F472-C, F4UZ-9F472-A, F78Z-9F472-AA, F7RZ-9G444-BA, DY-1040, XC2Z-9F472-BA, F1SZ-9F472-A, XR3Z-9G444-BB, F5WZ-9F472-BA, 5C5Z-9F472-BA, 6E5Z-9G444-AA, 5W6Z-9G444-AA, DY-1034, DY-1093, DY-1058, F1SZ-9F472-B, 6L7Z-9F472-BA, DY-761, F5AZ-9G444-B, F4SZ-9F472-A, F77Z-9F472-BA, F6DZ-9G444-B, DY-1039, F85Z-9G444-E, F5UZ-9F472-A, F75Z-9G444-AA, F88Z-9F472-AB, F4SZ-9F472-D, F8RZ-9G444-BB, F85Z-9G444-AA, F85Z-9G444-AB, F88Z-9F472-BA, DY-1053, XR3Z-9G444-JA, XC2Z-9F472-AA, DY-1038, DY-703, F6DZ-9G444-EA, F5MZ-9F472-AA, DY-1087, FOTZ-9F472-A, DY-1057, XR3Z-9G444-EA, XR3Z-9G444-HA, DY-661, DY-731
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2011, 1992-1995 Mercury Grand Marquis | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Oxygen Sensor
Part Number: F5MZ-9F472-B
$55.77 MSRP: $93.45
You Save: $37.68 (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
$70.74 MSRP: $96.27
You Save: $25.53 (27%)
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: 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
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

Mercury Grand Marquis Oxygen Sensors

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Mercury Grand Marquis Oxygen Sensors Parts Questions & Experts Answers

Oxygen Sensor, Rear Driver Side
GU2Z-9G444-A
Q: How to safely and effectively service the Heated Oxygen Sensors (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.