Oxygen Sensor
Choose an oxygen sensor for the correct position
Browse replacement oxygen sensors at Parts Factory Australia, also called O2 sensors or lambda sensors. Match your engine and the sensor position specified in the listing, then compare the connector, wiring lead and original part reference.
Selected oxygen-sensor listings
- Toyota Echo oxygen sensor — the linked NCP listing specifies 2NZ-FE/1NZ-FE applications and a post-cat sensor, reference 8946533030.
- Holden Commodore oxygen sensor — listed for VE/VZ 3.6L V6 applications in the post-cat position, reference 0258006743.
- Mazda 3 oxygen sensor — the linked BK listing offers 4-pin and 5-pin plug options. Compare the selected option with your existing sensor and check its stated application.
Review the full build range and fitment notes on the selected product page. A model name alone does not identify the correct sensor.
Check position, connector and reference
- Confirm the model series, build date and engine specification.
- Match the stated exhaust position: pre-cat/upstream or post-cat/downstream, and any bank or sensor number specified for your vehicle.
- Compare connector shape, pin count and wiring-lead arrangement with the original.
- Check the original part reference against the selected listing and variation.
For uncertain fitment, contact Parts Factory Australia with your vehicle details, original sensor number and photos of the connector.
Oxygen sensor FAQs
Can I use the same sensor in either exhaust position?
Only choose a sensor for the position confirmed by its listing. Do not assume a post-cat sensor is interchangeable with an upstream sensor.
Is the plug count enough to confirm fitment?
No. Use it together with the engine, sensor position, connector shape and part reference. Select the appropriate variation where the product page offers a choice.
Does a warning light mean the sensor needs replacing?
A warning light or fault code alone does not confirm the failed component. Have the cause checked before ordering a replacement.
Related parts and delivery
If a different component has been identified, browse MAP sensors or EGR valves. Check the chosen product for availability and review our delivery information and warranty terms.
Browse Mazda oxygen sensors, Suzuki oxygen sensors or Swift oxygen sensors.
Delivery and support
Parts Factory Australia offers free express shipping for orders under 500 g and free regular shipping for heavier items. Returns are within 7 days; see the returns conditions and shipping information.
For help matching a part, contact Parts Factory Australia with your vehicle details, original part number and clear photos of the part and connector.