Oxygen Sensor Upstream and Downstream for Subaru Forester WRX STI 2014-2021
Main Description
Upgrade your Subaru’s oxygen sensing with the Oxygen Sensor Upstream and Downstream set designed for Subaru Forester, WRX, and WRX STI models from 2014 to 2021. This dual-sensor package provides reliable monitoring of the air–fuel ratio and catalytic converter performance, helping your engine run cleaner and more efficiently while reducing idle roughness and fuel waste. Compatible with Forester 2014–2018, WRX 2015–2021, and WRX STI 2016, it includes both upstream and downstream sensors with OEM reference numbers to ensure a precise fit. The upstream sensor uses 5-wire air–fuel ratio sensing, while the downstream sensor is a 4-wire oxygen sensor with heating for faster response. Manufactured in Mainland China, this kit is a practical, cost-effective way to maintain emissions control and engine performance. All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Benefits & Tips
- Precise readings improve engine management, helping optimize fuel economy and reduce emissions over time.
- Heating-enabled sensors deliver quicker response after cold starts, contributing to smoother drivability.
- Two-sensor coverage simplifies replacement and ensures both upstream and downstream monitoring are active for Subaru models listed.
- Tip: Before ordering, review the part numbers carefully to confirm a correct match for your vehicle. If you’re unsure which item fits, send the Part Number or the original product photos to confirm before purchase.
- Tip: The only way to be 100% sure of fit is to compare your original part; we’ll check for you and respond within 24 hours.
- Tip: After installation, reset or relearn your ECU as recommended by your vehicle’s service guide to ensure optimal sensor readings.
Product Specifications
- Brand Name: IWOKPHD
- Choice: yes
- Electronic: No
- High-concerned chemical: None
- Hysteresis: 22690-AB010 (4-wire Oxygen Sensor)
- Linear: For SUBARU FORESTER WRX WRX STI 2014-2021
- OEM NO.: 22641-AA650, 22690-AB010, 234-5178, 234-4988
- Origin: Mainland China
- Repeatability: 22641-AA650 (5-wire Air Fuel Ratio Sensor)
- Resolution: 22690AB010, 22690 AB010, 234-4988, 2344988, 234 4988, 18175, 24478
- Sensitivity: 22641AA650, 22641 AA650, 234-5178, 2345178, 234 5178, 27004, 18174
- Sensor Type: Piezoelectric
- Type: Heating
- Part Number: Upstream: 22641-AA650, 22641AA650, 22641 AA650, 234-5178, 2345178, 234 5178, 27004, 18174; Downstream: 22690-AB010, 22690AB010, 22690 AB010, 234-4988, 2344988, 234 4988, 18175, 24478
- Application: For SUBARU FORESTER 2014-2018; For SUBARU WRX 2015-2021; For SUBARU WRX STI 2016
- Warranty: 2 years Warranty Type: Replacement Warranty
Package Includes:
- 1 piece 22641-AA650 + 1 piece 22690-AB010
- Or 1 piece Upstream 22641-AA650
- Or 1 piece Downstream 22690-AB010
Warnings / Reminders
- Please check the picture and the part number carefully to make sure that you bought the right part for your car.
- If you cannot determine which item fits your car, please send the Part Number or the original product photos to us to confirm before ordering.
- The only way to be 100% sure that the part will fit your vehicle is to check your original part. We will check for you and reply within 24 hours.
Language support: not specified for this product. All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty. Providing quality and trusted service since 2002 at intercyprus.com.