How to Service the Rear Heated Oxygen Sensor (HO2S) on Ford Escort?

The beginning of repairing the Heated Oxygen Sensor (HO2S) at the rear starts with a disconnection of its electrical connector. Lift the vehicle before its support using appropriate equipment. After that, remove the HO2S. You should perform installation by following the opposite sequence of removal steps.

How to Service the Front Heated Oxygen Sensor (HO2S) on Ford Escort?

The first step for servicing the Heated Oxygen Sensor (HO2S) at the front includes disconnecting both the battery ground cable and the HO2S electrical connector. After that, remove the HO2S. You should install the components by following the steps you used for removal in reverse order. The illustration does not show the exhaust manifold heat shield for proper representation purposes.

OEM Ford Escort Oxygen Sensor

Oxygen O2 Sensor

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Ford Escort 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:
- 1990-2003 Ford Escort | Base, LX, LX Sport, SE, Sport, ZX2, ZX2 Cool Coupe, ZX2 Hot Coupe, ZX2 S/R | 1.8L L4, 1.9L L4, 2.0L L4, 4 Cyl 1.9 L GAS, 4 Cyl 2.0 L GAS
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Ford Escort Oxygen Sensor Part Number: FOTZ-9F472-E
Product Specifications
- Other Name: Sensor - Hego
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1992 Ford Escort | Base, LX, LX Sport | 4 Cyl 1.9 L GAS
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Ford Escort Oxygen Sensor Part Number: F6CZ-9G444-DB
Product Specifications
- Other Name: Sensor Assembly; Sensor
- Replaces: F8CZ-9F472-BB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-2003 Ford Escort | Base, LX, SE, Sport | 2.0L L4, 4 Cyl 2.0 L GAS
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Ford Escort Oxygen Sensor Part Number: XS4Z-9G444-DA
Product Specifications
- Other Name: Sensor Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2002 Ford Escort | LX, SE | 4 Cyl 2.0 L GAS
View related parts
Ford Escort Oxygen Sensor Part Number: FO9Z-9F472-A
Product Specifications
- Other Name: Sensor - Hego
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1993 Ford Escort
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Ford Escort 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, 1987 Ford Escort | Base, GL, GT, LX, LX Sport, Pony | 4 Cyl 1.9 L GAS, 4 Cyl 2.0 L DIESEL
View related parts
Ford Escort Oxygen Sensor Part Number: F1CZ9F472A
Product Specifications
- Other Name: Sensor - Heated Exhaust Gas Oxygen (Hego); Sensor - Hego
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1991-1996 Ford Escort | GT | 4 Cyl 1.8 L GAS

Ford Escort 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 Escort parts. We keep a wide inventory of OEM Escort 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 Ford Escort Oxygen Sensor watches over residual oxygen in exhaust and helps the engine computer monitor air fuel mixture for low emissions. The exhaust stream of every Ford Escort has at least one upstream Oxygen Sensor positioned before the catalytic converter and one downstream Oxygen Sensor positioned after the catalytic converter so that the system can operate in closed loop. An Oxygen Sensor contains a zirconium dioxide element that is plated with platinum. A built-in heater brings the element to about 600°F. At this temperature, oxygen ions can migrate through the zirconium and generate a voltage of about 0.1 to 0.9 volts that indicates whether the mixture is rich or lean. Through the openings made in the threaded steel shell, the tip is exposed to the exhaust gases while top vents allow outside air to enter through the combustion chamber for comparison. The fuel injector pulse width is increased or decreased to maintain catalyst efficiency and reduce harmful emissions. The engine computer samples this signal several times per second. When contamination or failure occurs, feedback is disrupted, causing emissions to rise, which activates warning lights for the Oxygen Sensor on the Ford Escort dashboard.

Ford Escort Oxygen Sensor Parts and Q&A

Oxygen Sensor, Rear Driver Side
GU2Z-9G444-A
Q: How to Service the Rear Heated Oxygen Sensor (HO2S) on Ford Escort?
A:
The beginning of repairing the Heated Oxygen Sensor (HO2S) at the rear starts with a disconnection of its electrical connector. Lift the vehicle before its support using appropriate equipment. After that, remove the HO2S. You should perform installation by following the opposite sequence of removal steps.
Oxygen Sensor
XS4Z-9G444-DA
Q: How to Service the Front Heated Oxygen Sensor (HO2S) on Ford Escort?
A:
The first step for servicing the Heated Oxygen Sensor (HO2S) at the front includes disconnecting both the battery ground cable and the HO2S electrical connector. After that, remove the HO2S. You should install the components by following the steps you used for removal in reverse order. The illustration does not show the exhaust manifold heat shield for proper representation purposes.