Name: O2 Oxygen Sensor Ford Fiesta WP WQ WS 1.6L Duratec 2003-2012
Brand: Aftermarket OEM Replacement
SKU: COS802-3
Price: 73.49 AUD
Availability: InStock

If your Ford Fiesta's check engine light is on or fuel economy has dropped unexpectedly, a failing O2 sensor is one of the most common causes on the 1.6L Duratec engine. This BRAND NEW aftermarket OEM replacement sensor plugs directly in with no wiring modification required - cross-referenced against TecDoc catalogue for Fiesta WP WQ WS.

TO SUIT

FORD FIESTA WP 1.6L Duratec FYJA FYJB 74kW [2003-2005]

FORD FIESTA WQ 1.6L Duratec FYJA FYJB 74kW [2006-2008]

FORD FIESTA WS 1.4L Duratec SPJA 71kW [2008-2011] / 1.6L Duratec HXJA 88kW [2008-2012]

FITMENT CHECK

Before ordering confirm your engine code matches OEM number XL3F-9F472-BA. If you are unsure contact us with your VIN and date of manufacture - we will confirm fitment before you order.

OEM PART NUMBERS

XL3F-9F472-BA
5W6Z9G444BA
BA9F472A
BE5Z9G444A

OTHER PART NUMBERS

0258005717
EGO-006
ES20014
OX243

PACKAGE INCLUDES

1 x O2 Oxygen Sensor - 4-wire narrowband with round plug connector

ABOUT THIS SENSOR

The oxygen sensor measures exhaust gas oxygen content and reports to the ECU so the engine maintains the correct air-fuel ratio. When it degrades the Duratec engine runs rich or lean - leading to increased fuel consumption and rough idle.

A failed upstream O2 sensor left unresolved will also overload the catalytic converter with unburnt fuel over time. Replacing it promptly protects both your fuel economy and your cat.

COMMON SYMPTOMS OF FAILURE

Check Engine light on - fault codes P0130 to P0167
Increased fuel consumption with no change in driving habits
Rough idle or poor throttle response
Failed roadworthy or emissions test
Rotten egg smell from exhaust
Flat or sluggish O2 waveform on live OBD2 data

Identification
SKU	COS802-3
Barcode #	9341554010949
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	0258005717
Reference OEM Number	XL3F-9F472-BA
Other OEM Numbers	5W6Z9G444BA, BA9F472A, BE5Z9G444A
Related Part Numbers	COS802, EGO-006, ES20014, OX243
Product Specifics
Sensor Type	Oxygen Sensor
Placement On Vehicle	PRE-CAT
Type	Sensor
Features	Direct Fit
Manufacturer Warranty	1 Year
Ean	9341554010949
Make	Mazda
Other Details
Note	Verify fitment using the OEM part number before ordering.
Unit Of Measure	ea

How do I replace an oxygen sensor?

Most O2 sensors thread directly into the exhaust pipe or manifold. You will need an O2 sensor socket (22mm with a slot for the wire) and penetrating oil if the sensor is seized. Allow the exhaust to cool completely before starting. Some sensors also require a wiring harness connector to be unplugged. Always clear fault codes with an OBD2 scanner after replacement.

What fault codes does a faulty O2 sensor trigger?

A faulty O2 sensor typically triggers codes P0130 to P0167. The specific code indicates which sensor has failed - P0130 to P0138 relate to Bank 1 sensors and P0150 to P0158 relate to Bank 2 sensors. An OBD2 scanner will identify the exact sensor location.

Can I use a universal O2 sensor on my vehicle?

Universal sensors can work but require splicing the wiring harness which introduces risk of connection faults. A direct-fit aftermarket OEM replacement sensor with the correct connector plugs directly in with no cutting or splicing required. SensorGal stocks direct-fit sensors cross-referenced to OEM part numbers for most Australian vehicles.

How do I know if my O2 sensor is bad?

Common signs include poor fuel economy, rough idle, failed emissions test, rotten egg smell from the exhaust, and a Check Engine light with codes P0130-P0167. An OBD2 scanner showing a flat or sluggish O2 sensor waveform on live data also indicates a faulty sensor.

What is the difference between upstream and downstream O2 sensors?

The upstream (pre-cat) sensor monitors exhaust gases to help the ECU calculate fuel trim. The downstream (post-cat) sensor monitors catalytic converter efficiency. They serve different functions and are not interchangeable even if they look identical.

Can a bad O2 sensor damage my catalytic converter?

Yes. A faulty upstream O2 sensor can cause the engine to run rich, sending unburnt fuel into the catalytic converter. Over time this overheats and destroys the catalyst. Replacing the O2 sensor promptly protects your catalytic converter.

How many O2 sensors does my vehicle have?

Most 4-cylinder vehicles have two O2 sensors (one upstream, one downstream). V6 and V8 engines typically have four - one upstream and one downstream per bank. Contact us with your vehicle details and we will confirm the correct quantity and part numbers.