How to remove and install oxygen sensors in a Ford Focus?

Two oxygen sensors are in a vehicle, one before and one after the catalytic converter. The first sensor is heated for efficient exhaust gas monitoring. To remove it, remove the heat shield bolts and disconnect the wiring plug. The second sensor is under the oil pan in the exhaust pipe. Avoid contact between wiring and hot exhaust parts. Unscrew and remove the sensor carefully. Clean the sensor if needed, but avoid damaging the tip. Apply anti-seize compound to the sensor threads before tightening. Reconnect the wiring, keeping it away from hot exhaust parts. Check exhaust emissions to verify the sensor's function. Address any fault codes generated by a faulty sensor.

Genuine Ford Focus Oxygen Sensors

Oxygen O2 Sensor

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41 Oxygen Sensors found

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Ford Focus Sensor - Hego
Part Number: 8F9Z-9F472-H
$81.84 MSRP: $135.27
You Save: $53.43 (40%)
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Product Specifications
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012-2013 Ford Focus | 4 Cyl 2.0L DI TIVCT Petrol | 1-Speed Transmission, 5-Speed Manual Transmission - MTX75, 6-Speed Automatic Transmission DPS6, 6-Speed Manual Transaxle - MMT6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: BA5Z-9F472-A
$80.85 MSRP: $133.64
You Save: $52.79 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: Front Or Rear
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2018 Ford Focus | 4 Cyl 2.0L EcoBoost (240PS) | 1-Speed Transmission, 5-Speed Manual Transmission - MTX75, 6-Speed Automatic Transmission 6F15, 6-Speed Automatic Transmission DPS6, 6-Speed Manual Transaxle - MMT6, 6-Speed Manual Transmission - B6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: F1FZ-9F472-A
$75.02 MSRP: $124.00
You Save: $48.98 (40%)
Ships in 1 Business Day
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Product Specifications
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2018 Ford Focus | 3 Cyl 1.0L EcoBoost 120PS/125PS/140PS | 6-Speed Automatic Transmission 6F15, 6-Speed Manual Transmission - B6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: DS7Z-9F472-A
$84.15 MSRP: $139.09
You Save: $54.94 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2014-2018 Ford Focus | 4 Cyl 2.0L DI TIVCT Petrol | 1-Speed Transmission, 5-Speed Manual Transmission - MTX75, 6-Speed Automatic Transmission 6F15, 6-Speed Automatic Transmission DPS6, 6-Speed Manual Transaxle - MMT6, 6-Speed Manual Transmission - B6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Exhaust Gas - Oxygen
Part Number: CV6Z-9G444-A
$48.68 MSRP: $77.64
You Save: $28.96 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oxygen Sensor, Rear Oxygen Sensor
- Manufacturer Note: Rear
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012-2018 Ford Focus | 4 Cyl 2.0L DI TIVCT Petrol | 1-Speed Transmission, 5-Speed Manual Transmission - MTX75, 6-Speed Automatic Transmission 6F15, 6-Speed Automatic Transmission DPS6, 6-Speed Manual Transaxle - MMT6, 6-Speed Manual Transmission - B6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: 8F9Z-9F472-D
$124.30 MSRP: $205.45
You Save: $81.15 (40%)
Ships in 1 Business Day
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Product Specifications
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012 Ford Focus | 4 Cyl 2.0L DI TIVCT Petrol | 1-Speed Transmission, 5-Speed Manual Transmission - MTX75, 6-Speed Automatic Transmission DPS6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Exhaust Gas - Oxygen
Part Number: CM5Z-9G444-A
$61.71 MSRP: $102.00
You Save: $40.29 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2018 Ford Focus | 4 Cyl 2.0L EcoBoost (240PS) | 1-Speed Transmission, 5-Speed Manual Transmission - MTX75, 6-Speed Automatic Transmission 6F15, 6-Speed Automatic Transmission DPS6, 6-Speed Manual Transaxle - MMT6, 6-Speed Manual Transmission - B6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: FV4Z-9F472-A
$122.10 MSRP: $201.82
You Save: $79.72 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Front Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2018 Ford Focus | 4 Cyl 2.3L Ecoboost | 1-Speed Transmission, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6-Speed Automatic Transmission 6DCT450 - MPS6, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F15, 6-Speed Automatic Transmission DPS6, 6-Speed Manual Transaxle - MMT6, 6-Speed Manual Transmission - B6, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Front-Wheel Drive (Right Hand Drive), Left Hand Drive, RHD 4WD (FTD)
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Ford Focus Sensor - Hego
Part Number: 5S4Z-9F472-AA
$70.18 MSRP: $116.00
You Save: $45.82 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Front Oxygen Sensor, Oxygen Sensor
- Replaces: 3S4Z-9F472-CA, DY-990, 3S4Z-9F472-CC, DY-1031
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2006 Ford Focus | 4 Cyl 2.0L Duratec HE, 4 Cyl 2.3L | 4-Speed Automatic Transaxle - 4F27E, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: 3S4Z-9F472-DA
$96.69 MSRP: $159.82
You Save: $63.13 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2011 Ford Focus | 4 Cyl 2.0L Duratec HE, 4 Cyl 2.3L | 4-Speed Automatic Transaxle - 4F27E, 5-Speed Manual Transmission - MTX75, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: F8RZ-9G444-BB
$49.72 MSRP: $82.18
You Save: $32.46 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Replaced by: GU2Z-9G444-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2004 Ford Focus | 4 Cyl 2.0L, 4 Cyl 2.0L CVH EFI, 4 Cyl 2.0L Zetec EFI, 4 Cyl 2.0L Zetec VVT | 4AT 4F27E, 4-Speed Automatic Transaxle - 4F27E, 5MT, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6MT, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Exhaust Gas - Oxygen
Part Number: 5S4Z-9G444-BA
$59.95 MSRP: $99.09
You Save: $39.14 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Oxygen Sensor, Rear Oxygen Sensor
- Position: Passenger Side
- Replaces: 3S4Z-9G444-AA, 5S4Z-9G444-DA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2011 Ford Focus | 4 Cyl 2.0L Duratec HE, 4 Cyl 2.3L | 4-Speed Automatic Transaxle - 4F27E, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Focus Sensor - Hego
Part Number: XC2Z-9F472-BA
$49.72 MSRP: $82.18
You Save: $32.46 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Position: Driver Side
- Replaced by: GU2Z-9G444-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2004 Ford Focus | 4 Cyl 2.0L, 4 Cyl 2.0L CVH EFI, 4 Cyl 2.0L Zetec EFI, 4 Cyl 2.0L Zetec VVT | 4AT 4F27E, 4-Speed Automatic Transaxle - 4F27E, 5MT, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6MT, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Focus Sensor - Exhaust Gas - Oxygen
Part Number: F1FZ-9G444-A
$53.57 MSRP: $88.55
You Save: $34.98 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2018 Ford Focus | 3 Cyl 1.0L EcoBoost 120PS/125PS/140PS | 6-Speed Automatic Transmission 6F15, 6-Speed Manual Transmission - B6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Focus Sensor - Exhaust Gas - Oxygen
Part Number: F1FZ-9G444-E
$49.41 MSRP: $98.18
You Save: $48.77 (50%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Oxygen Sensor
- Replaced by: F1FZ-9G444-H
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018 Ford Focus | 3 Cyl 1.0L EcoBoost 120PS/125PS/140PS | 6-Speed Automatic Transmission 6F15, 6-Speed Manual Transmission - B6, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Focus Sensor - Hego
Part Number: F4ZZ-9F472-B
$86.42 MSRP: $140.00
You Save: $53.58 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Oxygen Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2003 Ford Focus | 4 Cyl 2.0L | 4AT 4F27E, 5MT, 6MT
View related parts
Ford Focus Sensor - Exhaust Gas - Oxygen
Part Number: 1R3Z-9G444-CA
$51.84 MSRP: $70.83
You Save: $18.99 (27%)
ADD TO CART
Product Specifications
- Other Name: Rear Oxygen Sensor
- Manufacturer Note: Located in pipe of the bottom of converter. Dark gray connector., PZEV
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004 Ford Focus | 4 Cyl 2.3L | 4-Speed Automatic Transaxle - 4F27E, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Focus Sensor - Hego
Part Number: F5MZ-9F472-DB
$27.89 MSRP: $38.11
You Save: $10.22 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2003 Ford Focus | 4 Cyl 2.0L | 4AT 4F27E, 5MT, 6MT
View related parts
Ford Focus Sensor Assembly
Part Number: F1SZ-9F472-B
$49.72 MSRP: $82.18
You Save: $32.46 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Sensor Assy
- Position: Front
- Replaced by: GU2Z-9G444-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2003 Ford Focus | 4 Cyl 2.0L | 4AT 4F27E, 5MT, 6MT
View related parts
Ford Focus Sensor - Hego
Part Number: F5MZ-9F472-AA
$40.82 MSRP: $82.18
You Save: $41.36 (51%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Replaced by: GU2Z-9G444-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2003 Ford Focus | 4 Cyl 2.0L | 4AT 4F27E, 5MT, 6MT

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1-20 of 41 Results

Ford Focus Oxygen Sensors

The Oxygen Sensorss in Ford Focus vehicles represents an important component of the car's system, as it is involved in the measurement of the quantity of oxygens that has not been burned in the exhaust, which will be used for the enhancement of the A/F mixture and the decrease of the exhaust emissions. The voltage signal depends on the oxygen concentration and the engine control computer is able to modify the fuel injector timing as per the requirements. This feedback mechanism allows the engine to run in a 'closed loop', thus optimising the efficiency of the catalytic converter. Zirconium dioxide-based oxygen sensors are commonly used in Ford Focus models; these cars may be equipped with both upstream and downstream sensors. Upstream oxygen sensor gives continual feed back for the adjustment of the air-fuel mixture, while downstream oxygen sensor checks on the efficiency of the catalytic converter. There may be latest models with air/fuel ratio sensors having broader sensing capability than the historic narrow band sensors. Contamination and age related aging can results in an increase in emission levels as well as loss of fuel economy of both the two types.

We provide a wide range of Ford Focus Oxygen Sensors at the best prices possible. If you need Ford Focus Oxygen Sensors, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Ford Focus Oxygen Sensors Parts Questions & Experts Answers

Sensor - Hego
3S4Z-9F472-CA
Q: How to remove and install oxygen sensors in a Ford Focus?
A: Two oxygen sensors are in a vehicle, one before and one after the Catalytic Converter. The first sensor is heated for efficient exhaust gas monitoring. To remove it, remove the heat shield bolts and disconnect the wiring plug. The second sensor is under the oil pan in the exhaust pipe. Avoid contact between wiring and hot exhaust parts. Unscrew and remove the sensor carefully. Clean the sensor if needed, but avoid damaging the tip. Apply anti-seize compound to the sensor threads before tightening. Reconnect the wiring, keeping it away from hot exhaust parts. Check exhaust emissions to verify the sensor's function. Address any fault codes generated by a faulty sensor.