How to Service the Heated Oxygen Sensors on Mercury Mystique?

To replace the heated oxygen sensor, you need to take off the engine splash shield, release the electrical connector of the sensor and unplug the wiring harness. Disassemble air conditioning and power steering hose retaining nuts, coolant hose studs, dipstick tube bolts and dipstick. Lastly, take out the exhaust manifold heat shield and sensor and reverse to install.

OEM Mercury Mystique Oxygen Sensors

Oxygen O2 Sensor

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4 Oxygen Sensors found

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Mercury Mystique 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 Mercury Mystique | GS | 4 Cyl 2.0 L GAS
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Mercury Mystique Oxygen Sensor Part Number: F6RZ-9F472-AA
$4.54 MSRP: $6.28
You Save: $1.74 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995 Mercury Mystique | Base, GS, GS Spree, LS | 4 Cyl 2.0 L GAS
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Mercury Mystique Oxygen Sensor Part Number: F5RZ-9F472-B
$52.08 MSRP: $72.05
You Save: $19.97 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly
- Replaces: F5RZ-9F472-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995-2000 Mercury Mystique | Base, GS, GS Spree, LS, LS Young America | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
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Mercury Mystique Oxygen Sensor Part Number: XC2Z-9F472-BB
$80.58 MSRP: $135.27
You Save: $54.69 (41%)
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:
- 1999-2000 Mercury Mystique | GS, LS | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS

Mercury Mystique Oxygen Sensors

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Mercury Mystique Oxygen Sensors Parts and Q&A

Oxygen Sensor, Rear Driver Side
GU2Z-9G444-A
Q: How to Service the Heated Oxygen Sensors on Mercury Mystique?
A: To replace the heated oxygen sensor, you need to take off the engine splash shield, release the electrical connector of the sensor and unplug the wiring harness. Disassemble air conditioning and power steering hose retaining nuts, coolant hose studs, dipstick tube bolts and dipstick. Lastly, take out the exhaust manifold heat shield and sensor and reverse to install.