NTK 24576 Oxygen Sensor - Downstream
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NTK
 Direct Fit Oxygen Sensor

NTK 24576 Oxygen Sensor - Downstream

Brand NTK 24576
Position Downstream
Wiring Harness Length 17.5000
Sensor Type Heated
Universal Or Specific Fit Specific
Wire Quantity 4
Thread Diameter 18.000
Mounting Type Threaded
Product line Direct Fit Oxygen Sensor
Fits Subaru · 8 vehicles

Direct fit design. Specific-fit replacement for straightforward sensor service.

Heated 4-wire sensor. Supports stable signal performance in emissions monitoring.

OE-level testing. Manufactured to meet or exceed original equipment specifications.

Cross-references Bosch 15638, Delphi ES20100 and DENSO Auto Parts 234-4736 for the same application. See all 7.

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Direct Fit Oxygen Sensor for Subaru Applications

NTK Oxygen Sensor 24576 is a direct fit, threaded heated sensor built for specific applications. It uses a 4-wire design with a 17.5-inch harness and 18 mm thread diameter for a precise replacement on downstream exhaust locations.

Key Features

  • Direct fit oxygen sensor for specific applications
  • Heated, 4-wire design for stable signal performance
  • Threaded mounting with 18 mm thread diameter
  • 17.5-inch wiring harness for application-specific routing
  • NTK part number 24576

Detailed Description

NTK 24576 is part of the Direct Fit Oxygen Sensor line, developed for straightforward replacement without universal adaptation. As a downstream oxygen sensor for Subaru Impreza, Legacy, and Outback applications, it matches the original equipment style used on the listed vehicles. This part number 24576 is also cross-referenced to Bosch 15638 and DENSO Auto Parts 234-4736 for the same application.

NTK builds oxygen sensors with ceramic-focused manufacturing and OE-level testing to support fit, form, and function. For Subaru Impreza, Subaru Legacy, and Subaru Outback models in the listed years, this sensor provides a specific-fit solution for emissions monitoring and exhaust feedback control.

What It Is Used For

  • Replacing a worn or slow-responding downstream oxygen sensor
  • Addressing check engine lights related to oxygen sensor performance
  • Restoring exhaust feedback for emissions system operation
  • Correcting drivability issues tied to inaccurate air-fuel data

Installation Notes and Tips

Verify the downstream location, connector style, wire count, and thread diameter before installation. Confirm the vehicle application by year, make, and model, and compare the original sensor routing to the 17.5-inch harness length. Use the part number 24576 to confirm the correct direct fit replacement.

Quality Assurance

NTK states that these oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand is part of the NGK family and is recognized as a major original equipment oxygen sensor supplier.

Related reading

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersPositionNotes
2001SubaruImpreza—2.2LH4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2001SubaruLegacyManual2.5LH4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2001SubaruOutbackManual2.5LH4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2000SubaruImpreza—2.2LH4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2000SubaruLegacyManual2.5LH4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2000SubaruOutbackManual2.5LH4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
1999SubaruImpreza—2.2LH4DownstreamB1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor
1999SubaruLegacy—2.2LH4DownstreamB1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 15638Delphi — ES20100DENSO Auto Parts — 234-473675-327722690AA38A22690AA380ES10597