NTK 27081 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
NTK
 Direct Fit 5-Wire A/F Sensor

NTK 27081 Air / Fuel Ratio Sensor - Upstream

Brand NTK 27081
Position Upstream
Wiring Harness Length 16.0000
Sensor Type Heated
Thread Length 0.38
Universal Or Specific Fit Specific
Wire Quantity 5
Thread Diameter 18.000
Mounting Bracket Included No
Product line Direct Fit 5-Wire A/F Sensor
Fits Subaru · 10 vehicles

Direct-fit design. Specific-fit replacement for listed applications with OE-style form and function.

Heated sensor. Built for faster operation and stable air/fuel ratio feedback.

OE-tested quality. Extensively tested during manufacturing to meet or exceed OE specifications.

Cross-references 22641AA79A for the same application. See all 1.

$86.97Free shipping
In stock · usually ships same day before 1pm CST
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Order total $86.97
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Air / Fuel Ratio Sensor options

Direct-fit air/fuel ratio sensor

NTK 27081 is a specific-fit heated air/fuel ratio sensor for upstream applications. It is built for Subaru models that use a 5-wire sensor configuration and is engineered to match OE fit, form, and function.

This NTK sensor uses a 16-inch wiring harness, an 18 mm thread diameter, and a 0.38-inch thread length. The heated design supports faster sensor operation, and the specific-fit layout helps simplify replacement on Subaru Ascent, Legacy, and Outback applications.

Key features

  • Direct-fit replacement for specific applications
  • Heated air/fuel ratio sensor design
  • 5-wire configuration
  • 16-inch wiring harness length
  • 18 mm thread diameter with 0.38-inch thread length
  • Mounting bracket not included

Detailed application coverage

Fits 2021-2022 Subaru Ascent, upstream. Fits 2021-2022 Subaru Legacy, upstream. Fits 2021-2022 Subaru Outback, upstream. Fits 2019-2020 Subaru Ascent, upstream. Fits 2020 Subaru Legacy, upstream. Fits 2020 Subaru Outback, upstream. This part cross-references Subaru 22641AA79A for the same application. For buyers searching for a Subaru Ascent upstream air/fuel ratio sensor, Subaru Legacy upstream oxygen sensor replacement, or Subaru Outback direct-fit sensor coverage, NTK 27081 matches the listed OE-style application.

What it helps address

  • Fault codes related to air/fuel ratio sensing
  • Rough idle caused by inaccurate sensor feedback
  • Fuel trim issues from a worn upstream sensor
  • Emissions performance problems tied to sensor response

Installation notes and quality

Confirm the connector, thread size, and upstream location before installation. This sensor is specific fit, so it should be matched to the exact listed application rather than used as a universal replacement. NTK states that its oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications.

Related reading

This part fits 10 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2022SubaruAscent2.4LH4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022SubaruLegacy2.4LH4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022SubaruOutback2.4LH4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021SubaruAscent2.4LH4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021SubaruLegacy2.4LH4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021SubaruOutback2.4LH4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020SubaruAscent2.4LH4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2020SubaruLegacy2.4LH4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2020SubaruOutback2.4LH4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2019SubaruAscent2.4LH4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
22641AA79A