Mazda CX-9 Oxygen Sensors
We found 18 eBay listings for Mazda CX-9 oxygen sensors, covering model years 1991 to 2024.
All Mazda oxygen sensor listings by model
Last checked: . Confirm current price and fitment with the seller.
Compare oxygen sensors options for the Mazda CX-9 by part number, specification and seller fitment details. Matching listing titles mention 1991–2024; this is seller-described coverage, not confirmed fitment. Check the exact generation, engine and required specification before choosing a listing.
What the listings say: Of the 18 listings for Mazda CX-9 oxygen sensors checked on 6 November 2026, 17 give model years between 1991 and 2024, most often 2011–2015 (5). Positions named in the titles: downstream (10), upstream (3). Part numbers in more than one title: 234-4489. Titles are the sellers’ descriptions, not confirmed fitment: match the part number, model year, generation and engine before you buy.
Found 18 listings for "mazda cx 9 oxygen sensors"
Oxygen O2 Sensor 234-4046 234-4045 For 1991-2005 Mazda 6 CX-9 Tribute B3000 Part
Set of 2 Oxygen O2 Sensor for 2007-2010 Mazda CX-9 CX9 V6 3.5L 3.7L
2pcs Up+Downstream Oxygen Sensors For 2019-2023 Mazda CX-5 & CX-9 2.5L L4 Turbo
4pcs Oxygen O2 Sensor For Mazda CX-9 3.7L Ford Edge Lincoln MKX 3.5L Upper+Lower
AISIN Downstream Oxygen (O2) Sensor for Mazda CX-5 CX-9 3 6 2013-2024 2.0L 2.5L
Set of 2 Sensor Oxygen O2 For Mazda CX-9 3.5L V6 2007 & 3.7L V6 2008 2009 2010
O2 Sensor 02 Rear Downstream Oxygen Fit For 2011-2015 Mazda CX-9 3.7L 234-4489
2 pc Bosch Upstream Oxygen Sensors for 2011-2015 Mazda CX-9 3.7L V6 O2 yf
Downstream O2 Oxygen Sensor for Mazda CX-5 2013-2016 2019-2021 CX-9 2.0L 2.5L
2pcs Up+Downstream Oxygen Sensors For 2019-2023 Mazda CX-5 & CX-9 2.5L L4 Turbo
Denso Oxygen 02 O2 Sensor 234-4489 for 2011-2015 Mazda CX-9 3.7L Downstream Rear
2PCS Upper+Lower Oxygen O2 Sensor For 2018-2021 Mazda 6 2019-2023 CX-5 CX-9 2.5L
2PCS Up+Down Oxygen Sensor For Mazda CX-5 & CX-9 2.5L L4 Turbocharged 2019-2023
2PCS Up & Down Oxygen O2 Sensors For 2019 2020 2021 Mazda 6 CX-5 CX-9 2.5L L4
2pcs Up+Downstream Oxygen Sensors For 2019-2023 Mazda CX-5 & CX-9 2.5L L4 Turbo
Upstream Downstream O2 Oxygen Sensor For 2011-2015 Mazda CX-9 3.7L Set of 4
Downstream O2 Oxygen Sensor Replacement For 2011-2015 Mazda CX-9 3.7L 234-4490
2PCS Oxygen O2 Sensor Upstream+Downstream For 2016 2017 2018 Mazda CX-9 2.5L L4
Questions about these listings
Which model years are named in the listings for Mazda CX-9 oxygen sensors?
17 listing titles give model years from 1991 to 2024; 2011–2015 appears most often (5 listings). Check your car’s year against the fitment details in each listing.
Which positions are named in the listings for Mazda CX-9 oxygen sensors?
The titles name downstream (10 listings) and upstream (3). Order for the position on your car, as stated in the title or the seller’s fitment details.
Which part numbers appear in more than one listing for Mazda CX-9 oxygen sensors?
234-4489 appears in more than one title. Compare the number on your old part with the listing before you buy.
How do I check fitment before buying Mazda CX-9 oxygen sensors?
Find which sensor has failed. Upstream sensors sit before the catalytic converter and control fuelling; downstream sensors sit after it and monitor the converter. A fault code that names the bank and sensor number identifies the position. Some engines use a wideband (air-fuel ratio) sensor upstream. It is not interchangeable with an ordinary oxygen sensor, so match the type as well as the position.
Check compatibility before buying
These listings were found using Mazda CX-9 oxygen sensors search terms. A search match does not establish fitment. Compare the part number, vehicle year, generation and engine with the seller's compatibility details. Confirm delivery, returns and the final price on eBay before ordering.
Match the oxygen sensor to its exact position
Reference: NTK guide to oxygen (lambda) sensor types. Use the catalogue’s correct regional application.