NTK 24558 Oxygen Sensor - Upstream

Direct-Fit Oxygen Sensor for Toyota Celica

NTK Oxygen Sensor 24558 is a specific-fit, heated oxygen sensor built for direct replacement applications. It is engineered for import and domestic coverage, with OE-style fit, form, and function for the Toyota Celica.

• Heated oxygen sensor with a 4-wire design for stable signal control.
• Specific-fit construction for direct replacement without universal adaptation.
• Flange mounting style with an 18 mm thread diameter.
• 12.75-inch wiring harness length for application-specific routing.
• Part number 24558 for easy identification during ordering and service.

Detailed Product Overview

NTK 24558 is part of the Direct Fit Oxygen Sensor line, a product family focused on application-specific coverage and OE-style replacement. NTK draws on its role as a major oxygen sensor manufacturer and uses controlled ceramic technology from raw material through finished sensor production. For Toyota Celica service, this sensor is listed for 1990-1991 models in the upstream position with a B1S1 configuration for Federal Emissions applications.

This oxygen sensor is used to monitor exhaust oxygen content so the engine control system can adjust fuel delivery. The heated design helps the sensor reach operating temperature more quickly, which supports consistent feedback during normal driving conditions. This part number 24558 is also cross-referenced to Monroe Shocks & Struts 213-1439 and 234-4158 for the same application.

Common Issues It Can Address

• Check engine light related to oxygen sensor performance.
• Rough idle or inconsistent air-fuel control.
• Reduced fuel economy caused by inaccurate exhaust feedback.
• Emissions test failures tied to sensor response problems.
• Slow sensor warm-up in heated oxygen sensor circuits.

Installation Notes and Tips

Verify the upstream B1S1 location, thread diameter, and harness length before installation. Confirm Federal Emissions application details on the Toyota Celica and inspect the connector routing and flange mounting point for proper alignment. Use the vehicle service information for torque and wiring procedures specific to the application.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand also emphasizes OE application technology and original equipment sensor manufacturing experience.