NTK 24571 Oxygen Sensor - Upstream

Direct-Fit Oxygen Sensor

This NTK direct-fit oxygen sensor is built for specific applications and uses a threaded mounting design with a 20-inch harness. It is a heated, 4-wire sensor engineered for accurate exhaust feedback and OE-style fitment. Fits 2000-2002 Toyota Celica, upstream.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Heated 4-wire design for stable sensor operation
• Threaded mounting with 18 mm thread diameter
• 20-inch wiring harness for application-specific routing
• NTK direct-fit line focused on OE-style form and function

Detailed Description

NTK 24571 is part of the Direct Fit Oxygen Sensor line, a product family built for application-specific replacement needs. As an oxygen sensor for the Toyota Celica, it is designed around the original mounting style and electrical configuration, helping maintain proper exhaust monitoring and air/fuel feedback. The heated sensor design and 4-wire layout support consistent operation once installed, while the threaded body and 18 mm thread diameter match the specified application. NTK 24571 is also backed by NTK’s OE-focused manufacturing approach and extensive testing standards. This part cross-references Bosch (e.g., 13619, 15238) for the same application.

What It Is Used For

• Replacing a worn or slow-responding oxygen sensor
• Restoring accurate exhaust gas feedback to the engine control system
• Addressing check engine light concerns related to sensor performance
• Correcting drivability issues tied to improper air/fuel monitoring
• Maintaining proper emissions system operation on the Toyota Celica

Installation Notes and Tips

Verify the upstream location and threaded mounting style before installation. Confirm the harness length, wire count, and thread diameter match the original sensor configuration. Use the vehicle’s service information to confirm the correct Bank 1 Sensor 1 application for the Toyota Celica. NTK 24571 should be installed only on the listed specific-fit application.

Quality Assurance

NTK states that its 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.