NTK 24026 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor for Honda and Acura

NTK Oxygen Sensor 24026 is a direct fit, heated downstream oxygen sensor built for specific applications in select Honda and Acura vehicles. It is engineered for the B1S2 position and uses a threaded mounting style with a 4-wire configuration for OE-style replacement.

As part of NTK’s Direct Fit Oxygen Sensor line, this sensor reflects the brand’s focus on import and domestic coverage with application-specific fitment and OE-level form and function. It is a strong match for drivers searching for a 2006-2011 Honda Civic downstream oxygen sensor or a 2006-2011 Acura CSX B1S2 oxygen sensor replacement.

Key Features

• Direct fit oxygen sensor for specific vehicle applications
• Heated sensor design for downstream exhaust monitoring
• 4-wire configuration with 23.25 in. wiring harness length
• 18 mm thread diameter and threaded mounting type
• Built for B1S2 downstream placement
• NTK part number 24026

Detailed Description

NTK 24026 is a specific-fit oxygen sensor designed for downstream use in select Honda Civic, Honda Fit, and Acura CSX applications. It is intended for vehicles that require a heated, threaded oxygen sensor with OE-style dimensions and electrical configuration. The sensor supports exhaust feedback after the catalytic converter, helping the engine management system monitor emissions performance and air-fuel control.

NTK is known for original equipment oxygen sensor manufacturing, and this Direct Fit Oxygen Sensor line is built around application coverage, ceramic technology, and manufacturing controls that support consistent fit and signal performance. If you need an NTK 24026 replacement for a 2006-2011 Honda Civic or a 2007-2008 Honda Fit, this part matches the listed downstream B1S2 position.

This part cross-references DENSO Auto Parts (e.g., 234-4358) for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect oxygen sensor signal after the catalytic converter
• Emissions test failures tied to sensor performance
• Rough fuel control caused by a worn or slow-responding sensor
• Replacement needs for a damaged or aging B1S2 sensor

Installation Notes and Tips

Confirm the vehicle’s downstream B1S2 sensor location before ordering. This sensor uses a threaded mounting type and an 18 mm thread diameter, so the exhaust bung must match the listed specification. Verify connector routing and harness length against the original sensor before installation on a Honda Civic, Honda Fit, or Acura CSX.

For best results, inspect the exhaust threads and wiring path before removal of the old sensor. Use the vehicle’s service information to confirm the exact application and clear any diagnostic trouble codes after installation.

Quality Assurance

NTK manufactures oxygen sensors with OE application coverage and extensive production testing to support quality and reliability that meet or exceed original equipment specifications. The brand’s OE-focused engineering and ceramic manufacturing expertise are central to the Direct Fit Oxygen Sensor line.