Subaru WRX Oxygen Sensors
We found 19 eBay listings for Subaru WRX oxygen sensors, covering model years 2001 to 2021.
All Subaru oxygen sensor listings by model
Last checked: . Confirm current price and fitment with the seller.
Compare oxygen sensors options for the Subaru WRX by part number, specification and seller fitment details. Matching listing titles mention 2001–2021; 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 19 listings for Subaru WRX oxygen sensors checked on 2 November 2026, 10 give model years between 2001 and 2021, most often 2015–2017 (5). Positions named in the titles: downstream (9), upstream (3). Brands named: Denso (7). Part numbers in more than one title: 234-9034, 234-4988. Titles are the sellers’ descriptions, not confirmed fitment: match the part number, model year, generation and engine before you buy.
Found 19 listings for "subaru wrx oxygen sensors"
#22641-AA042 Uptream/Front Oxygen O2 Sensor For Subaru Impreza WRX 2.0L 02-05
2PCS Up+Downstream Oxygen Sensor For Subaru Forester 14-17 WRX 15-17 2.0L Turbo
2PCS Up+Downstream Oxygen Sensor For Subaru Forester 14-17 WRX 15-17 2.0L Turbo
New Up Air Fuel Ratio Oxygen O2 Sensor For Subaru Impreza WRX STI 234-9034
Downstream Oxygen Sensor OE Style DENSO 234-4988 For Subaru Forest WRX 2.0L H4
DENSO Up Air Fuel Ratio Oxygen O2 Sensor For Subaru Impreza WRX STI 234-9034 NEW
Downstream Oxygen Sensor OE Style DENSO 234-4988 For Subaru Forest WRX 2.0L H4
1X 234-4732 Denso Oxygen Sensor for 2001-17 Forester Impreza Legacy Outback WRX
Set of 2 Oxygen O2 Sensor For 2015-2017 Subaru WRX 2.0L Upstream & Downstream
OEM NEW Subaru O2 Oxygen Sensor 22690AA850 2008-2021 Impreza WRX STI 2.5L
TRQ Oxygen O2 Sensor Downstream for Subaru WRX Legacy Outback Forester Ascent
Air Fuel Ratio Oxygen O2 Sensor 234-9034 For Subaru Impreza WRX STI DENSO US NEW
Uptream/Front Air Fuel Ratio Oxygen O2 Sensor for Subaru Impreza WRX 2.0L 02-05
Upstream & Down Oxygen Sensor For Subaru Forester WRX 2.0L Turbo 2014 15-2017 H4
TWO Up+Downstream Oxygen Sensor For Subaru Forester WRX 2.0L Turbo 15 16 17
Air Fuel Ratio Oxygen O2 Sensor 234-9034 For Subaru Impreza WRX STI DENSO US NEW
Denso OEM Oxygen O2 Sensor Upstream For Subaru Forester WRX 2.0L H4 22641AA650
UD Up+Downstream Oxygen Sensor For Subaru 14-17 Forester 15-17 WRX 2.0L Turbo H4
2X Up+Downstream O2 Oxygen Sensor For Forester WRX 2.0L Turbo 2015-17
Questions about these listings
Which model years are named in the listings for Subaru WRX oxygen sensors?
10 listing titles give model years from 2001 to 2021; 2015–2017 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 Subaru WRX oxygen sensors?
The titles name downstream (9 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 Subaru WRX oxygen sensors?
234-9034 and 234-4988 appear 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 Subaru WRX 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 Subaru WRX 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.