My Account About Us Help Desk
Go-Parts
Account About Us Help Desk
Cart 0
Your cart is empty
Add an item to see it appear here.
Oxygen Sensor
View 1
View 2
View 3
View 4

Oxygen Sensor - Downstream (NGK) for 2019-2024 Subaru Ascent, Legacy, Outback NEW

Out of Stock
$ 252 .11

Product Notes

Position: Downstream
B1S2 OE MFR: NTK
Direct Fit Oxygen Sensor
NTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.
Brand: NGK
Condition: New
See All Other Oxygen Sensors
LIFE
TIME
Lifetime Warranty Included
This part is backed by our industry-leading lifetime warranty. Shop with total confidence.
100%money-back 120-dayreturns OE-gradequality
Wrenchy the Robot

Meet Wrenchy - The Amazing Parts Assistant!

Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.

Specifications & Info


Attribute Value
Connector Gender Male
Connector Shape Square
Grade Type Standard Replacement
Heated Yes
Hex Size 7/8" (22mm)
Mounting Type Threaded
Sensor Type Narrow-band
Technology Switching Zirconia Type
Terminal Gender Female
Terminal Quantity 4
Terminal Type Pin
Thread Diameter 18.00
Wire Quantity 4
Wiring Harness Length 240.00, 9.50
Wrench Size 7/8" (22mm)

Vehicle Fitment Guide

This part fits the following vehicles:

Subaru 3 models (tapclick to expand)(tapclick to hide)
Ascent 2019-2024 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base SUV 2019 - 2024 H4 2.4L Turbo AWD Automatic CVT
Convenience SUV 2019 - 2024 H4 2.4L Turbo AWD Automatic CVT
Limited SUV 2019 - 2024 H4 2.4L Turbo AWD Automatic CVT
Onyx Edition SUV 2022 - 2024 H4 2.4L Turbo AWD Automatic CVT
Onyx Edition Limited SUV 2023 - 2024 H4 2.4L Turbo AWD Automatic CVT
Premier SUV 2019 - 2024 H4 2.4L Turbo AWD Automatic CVT
Premium SUV 2019 - 2024 H4 2.4L Turbo AWD Automatic CVT
Touring SUV 2019 - 2024 H4 2.4L Turbo AWD Automatic CVT
Legacy 2020-2024 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Sedan 2020 - 2024 H4 2.5L AWD Automatic CVT
Convenience Sedan 2020 - 2022 H4 2.5L AWD Automatic CVT
GT Sedan 2023 - 2024 H4 2.4L Turbo AWD Automatic CVT
Limited Sedan 2020 - 2024 H4 2.5L AWD Automatic CVT
Limited GT Sedan 2020 - 2022 H4 2.4L Turbo AWD Automatic CVT
Limited XT Sedan 2020 - 2022 H4 2.4L Turbo AWD Automatic CVT
Premier Sedan 2020 - 2021 H4 2.5L AWD Automatic CVT
Premier GT Sedan 2020 - 2022 H4 2.4L Turbo AWD Automatic CVT
Premium Sedan 2020 - 2024 H4 2.5L AWD Automatic CVT
Sport Sedan 2023 - 2024 H4 2.4L Turbo AWD Automatic CVT
Sport Sedan 2020 - 2022 H4 2.5L AWD Automatic CVT
Touring Sedan 2020 - 2024 H4 2.5L AWD Automatic CVT
Touring XT Sedan 2020 - 2024 H4 2.4L Turbo AWD Automatic CVT
Outback 2020-2024 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Wagon 2020 - 2024 H4 2.5L AWD Automatic CVT
Convenience Wagon 2020 - 2024 H4 2.5L AWD Automatic CVT
Field Wagon 2023 H4 2.4L Turbo AWD Automatic CVT
Geyser Blue Edition Wagon 2024 H4 2.4L Turbo AWD Automatic CVT
Limited Wagon 2020 - 2024 H4 2.5L AWD Automatic CVT
Limited XT Wagon 2020 - 2024 H4 2.4L Turbo AWD Automatic CVT
Onyx Edition Wagon 2023 - 2024 H4 2.5L AWD Automatic CVT
Onyx Edition XT Wagon 2020 - 2024 H4 2.4L Turbo AWD Automatic CVT
Outdoor XT Wagon 2020 - 2021 H4 2.4L Turbo AWD Automatic CVT
Premier Wagon 2020 - 2022 H4 2.5L AWD Automatic CVT
Premier XT Wagon 2020 - 2024 H4 2.4L Turbo AWD Automatic CVT
Premium Wagon 2020 - 2024 H4 2.5L AWD Automatic CVT
Touring Wagon 2023 H4 2.4L Turbo AWD Automatic CVT
Touring Wagon 2020 - 2024 H4 2.5L AWD Automatic CVT
Touring XT Wagon 2020 - 2024 H4 2.4L Turbo AWD Automatic CVT
Wilderness Wagon 2022 - 2024 H4 2.4L Turbo AWD Automatic CVT
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.

Policies

Shipping Information

We offer fast, reliable shipping on all orders:

  • Ships to all countries via US Postal Service Priority Mail.
  • Most orders ship within 1 business day.
  • Delivery time: 1-4 business days after shipment.
  • International shipping available, including APO/FPO addresses.
  • Tracking information provided for all shipments.
  • Additional handling fees may apply for oversized/overweight packages.

Return Policy

We want you to be 100% satisfied with your purchase. That's why we offer:

  • 120-Day Returns - Return any part within 120 days from date of receipt.
  • Must obtain RMA (Return Merchandise Authorization) number before returning.
  • Parts must be in original condition, uninstalled, unaltered, and in original packaging.
  • Important: Electrical parts are not returnable if unsealed.
  • Please inspect parts upon arrival and notify us within 5 days of receiving incorrect or damaged parts.
  • Refunds processed after warehouse receives return and credited to original payment method.

Warranty

This part comes with a limited lifetime warranty. Warranty begins on the original purchase date.

Warranty does NOT cover:

  • Shipping costs or labor expenses.
  • Installation errors.
  • Parts used for racing.
  • Commercial vehicle parts.
NTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.

Fits Years: 2019 2020 2021 2022 2023 2024

Fits Models: Ascent, Legacy, Outback

Go-Parts Garage · Featured Guide

A Guide to Oxygen Sensor Replacement for the 2016-2024 Subaru Outback

Everything you need to know about diagnosing and replacing a faulty oxygen sensor on your Outback.

Read Full Guide →
Why Millions Choose Go-Parts

Your Go-To Place
for auto parts.

In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.

100%
Money-Back Guarantee

Shop With Total Confidence

If it doesn't fit, we make it right. No gimmicks, no fine print.

120
Day Return Window

4× the Industry Standard

Most retailers stop at 30 days. We give you a full four months to install, test, and return for a 100% refund — return shipping on us.

NEW
Direct-Fit Replacement

Engineered To OEM Specs

Brand-new aftermarket parts from trusted suppliers — built to original-equipment specifications so they fit and function like the factory unit, at a fraction of the price.

What buyers are saying.

★★★★★ 4.9 1,451 verified reviews

Racing Partner Videos

Racing partner video
Racing partner video
Racing partner video
Racing partner video
×

Search by Vehicle

1
2
3
Added to cart · Part