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Precision Oxygen Sensor Engineered for the Acura NSX
The NTK 24586 is a direct-fit heated oxygen sensor built to replace the factory O2 sensor on 1991 to 2001 Acura NSX models. NTK is the sensor division of NGK, the same company that manufactures NGK spark plugs, and the 24586 is manufactured to the same tight tolerances applied to NTK's full OEM sensor lineup. This 4-wire heated design uses a 24.75-inch lead length and direct-fit connector so it installs without cutting, splicing, or adapter wiring. Oxygen sensor condition directly affects fuel trim, emissions performance, and throttle response on the NSX's naturally aspirated C30A and C32B engines. The NTK 24586 restores factory sensor function and keeps the ECU operating on accurate fuel mixture data.
Key Features
- Direct-fit heated oxygen sensor for 1991 to 2001 Acura NSX
- Manufactured by NTK, the sensor division of NGK
- 4-wire heated design with 24.75-inch lead length
- OEM-matching direct-fit connector, no splicing or adapters required
- Restores factory fuel trim and emissions performance
- Compatible with C30A and C32B naturally aspirated engines
- Part number: NTK 24586
- SKU: NGK24586
Fitment
| Year Range | Make | Model |
|---|---|---|
| 1991-2001 | Acura | NSX |
Specifications
| Detail | Value |
|---|---|
| Part Number | 24586 |
| SKU | NGK24586 |
| Brand | NTK by NGK |
| Type | Switching Oxygen Sensor |
| Wires | 4-wire heated |
| Lead Length | 24.75 inches |
| Fitment | Direct-Fit |
| UPC | 075926245865 |
What's Included
- 1x NTK 24586 direct-fit oxygen sensor
About NTK by NGK
NTK is the sensor manufacturing division of NGK Spark Plugs, one of the world's largest manufacturers of spark plugs and automotive sensors. NTK produces oxygen sensors, MAF sensors, MAP sensors, and other electronic engine management components to OEM supply standards. NTK sensors are used as original equipment by major automotive manufacturers and are available as aftermarket replacements built to the same specifications.
Frequently Asked Questions
What is the difference between NGK and NTK?NGK manufactures spark plugs and ignition components. NTK is NGK's dedicated sensor division, producing oxygen sensors, MAF sensors, and other electronic engine management sensors. The NTK 24586 is an NTK product, branded and sold under the NTK name rather than NGK. Both divisions are part of the same parent company and apply the same quality standards.
Is the NTK 24586 a direct fit for the Acura NSX without any wiring modification?Yes. The NTK 24586 uses an OEM-matching direct-fit connector for the 1991 to 2001 Acura NSX. No cutting, splicing, or adapter harness is needed for a standard installation.
What oxygen sensor position does the NTK 24586 replace on the Acura NSX?Verify the exact sensor position by cross-referencing your vehicle's oxygen sensor location with the NTK 24586 application data before ordering. The NSX uses multiple oxygen sensors. Confirm whether you need the upstream or downstream sensor for your specific repair.
How does a failing oxygen sensor affect NSX performance?A failing or slow oxygen sensor causes the ECU to operate on inaccurate fuel mixture data. This can result in poor fuel economy, rough idle, failed emissions tests, and reduced throttle response. Replacing the sensor with an NTK 24586 restores accurate closed-loop fuel control.
Does the NTK 24586 work on both the NSX and the NSX-T?Yes. The 24586 fits both the NSX coupe and the NSX-T targa variants from 1991 to 2001, as both use the same engine and sensor architecture.
Is the NTK 24586 covered under any warranty?NTK backs their sensors with a limited warranty against defects in materials and workmanship. Contact NTK or NGK directly for current warranty terms applicable to your purchase.
Can I use a generic universal oxygen sensor instead of the NTK 24586?Universal oxygen sensors require cutting and splicing the wiring harness and often require calibration. The NTK 24586 is a direct-fit sensor that uses the factory connector and installs without any wiring modification. For a vehicle like the Acura NSX, a direct-fit sensor is the correct choice to maintain OEM-level sensor accuracy.
How often should oxygen sensors be replaced on the Acura NSX?NGK and NTK recommend inspecting oxygen sensors at or after 60,000 miles. Older sensors may degrade more quickly due to exhaust contamination and heat cycling. If your NSX is showing fuel trim codes, a slow sensor code, or failed emissions, test and replace the oxygen sensor with the NTK 24586 before pursuing other diagnostics.
Installation Notes
- Allow the exhaust system to cool fully before beginning sensor removal.
- Spray the old sensor's threads with penetrating oil and allow adequate soak time before removal.
- Use an oxygen sensor socket to remove the old sensor without damaging the bung threads.
- Inspect the sensor bung threads for damage or contamination before installing the new sensor.
- Apply anti-seize to the new sensor threads if not pre-applied, following NTK's application instructions.
- Install the NTK 24586 and torque to manufacturer specification.
- Connect the OEM-matching plug and verify the harness is routed clear of heat sources.
- Clear any related fault codes and verify the oxygen sensor is operating correctly with a scan tool before returning the vehicle to service.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
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