How to Service the Heated Oxygen Sensors on Mercury Mystique?

The service of a heated oxygen sensor should begin with the removal of the engine splash shield. It starts by disconnecting the heated oxygen sensor electrical connector then removing the wiring harness from its retaining clip. The service begins by removing first the air conditioning hose retaining nut followed by the step to remove the power assisted steering hose retaining nut. Before removing the heated oxygen sensor you need to disconnect both the coolant hose retaining studs along with the dipstick tube and lifting eye retaining bolts. The exhaust manifold heat shield requires removal before you can extract both the heated oxygen sensor. To install the part you should perform the steps in opposite order of removal.

OEM Mercury Mystique Oxygen Sensors

Oxygen O2 Sensor

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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%)
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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%)
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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
$61.73 MSRP: $103.64
You Save: $41.91 (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

OEM Oxygen Sensors 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 Sensors with long life and a perfect fit. Come to our website and find genuine Mercury Mystique parts. We keep a wide inventory of OEM Mystique 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 Mystique Oxygen Sensors have an excellent reputation due to their durability and quality and are indispensable for improving the engine's efficiency and safety of many Mercury Mystique vehicles. These sensors detect the levels of unburned oxygen in the exhaust, and hence the engine control computer is enabled to control the air/fuel ratio; this translates into better efficiency and performances of the vehicles, not forgetting the aspect of reduction of pollution. Normally featuring zirconium dioxide technology, the Mercury Mystique Oxygen Sensors may be narrow-band or wideband to give perfect control over the air/fuel mix. This versatility also provides the Mercury Mystique with the capability for generating the highest feasible fuel economy even as the sensors get predisposed to corrosion due to contamination and other factors. Failure to service these Oxygen Sensors from time to time will lead to a decrease in performance as well as an increase in emissions. The Mercury Mystique with mid-size sedan which started in 1995 has the family connection with the Ford Contour; this means that it can accept a variety of powertrain parts. Not only does the fitting of the Mercury Mystique Oxygen Sensors improve on the functionality of the car but does so in a manner that makes the car a safer car to drive since it reduces the incidents of a car stalling. As electric control units require accurate voltage signals according to the oxygen concentration, these Oxygen Sensors from Mercury's automotive unit are unique offerings, which prove Mercury's pledge to reliability and advancement. In conclusion, the Mercury Mystique Oxygen Sensors are very important in ensuring that the Merucry Mystique cars perform at their optimal hence being important to the owners of these cars.

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:
The service of a heated oxygen sensor should begin with the removal of the engine splash shield. It starts by disconnecting the heated oxygen sensor electrical connector then removing the wiring harness from its retaining clip. The service begins by removing first the air conditioning hose retaining nut followed by the step to remove the power assisted steering hose retaining nut. Before removing the heated oxygen sensor you need to disconnect both the coolant hose retaining studs along with the dipstick tube and lifting eye retaining bolts. The exhaust manifold heat shield requires removal before you can extract both the heated oxygen sensor. To install the part you should perform the steps in opposite order of removal.