NTK 23524 Oxygen Sensor - Upstream or Upstream Left

Direct Fit Oxygen Sensor for Mitsubishi Applications

The NTK Direct Fit Oxygen Sensor 23524 is a heated, threaded replacement sensor built for specific Mitsubishi applications. It is designed for direct-fit service on select Mitsubishi Outlander, Eclipse, Montero, and Montero Sport models, with OE-equivalent design and application-specific wiring length for a clean replacement.

NTK is the Sensor Specialist within the NGK family of products, and this oxygen sensor line is built with ceramic-focused manufacturing and extensive testing to meet or exceed OE specifications. For drivers searching for a direct fit oxygen sensor for Mitsubishi Outlander upstream or a replacement oxygen sensor for Mitsubishi Eclipse upstream, NTK 23524 provides a vehicle-specific solution.

Key Features

• Brand: NTK Direct Fit Oxygen Sensor
• Part Number: 23524
• Heated oxygen sensor design
• Specific-fit replacement for select Mitsubishi vehicles
• Threaded mounting type with 18 mm thread diameter
• 4-wire configuration
• Wiring harness length: 30.7500
• OE-equivalent design for direct replacement service

Detailed Description

The NTK 23524 oxygen sensor is engineered for precise fit, form, and function in emissions control applications. It is a direct fit oxygen sensor for Mitsubishi Outlander upstream positions, a replacement oxygen sensor for Mitsubishi Eclipse upstream applications, and also covers select Montero and Montero Sport upstream left locations. NTK manufactures oxygen sensors with controlled ceramic technology and validates them through production testing to support reliable operation and OE-level performance expectations.

This part cross-references Bosch 13412 and DENSO Auto Parts 234-4317 for the same application. If you are replacing a failing upstream sensor on a Mitsubishi Montero or Mitsubishi Montero Sport, NTK 23524 offers a specific-fit solution that matches the original sensor style and connection layout.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings
• Rough idle or hesitation caused by sensor signal issues
• Reduced fuel economy from inaccurate exhaust feedback
• Emissions test failures tied to upstream sensor faults

Installation Notes and Tips

• Verify the vehicle position before ordering: Fits 2007-2013 Mitsubishi Outlander, Upstream; Fits 2006-2012 Mitsubishi Eclipse, Upstream; Fits 2001-2006 Mitsubishi Montero, Upstream Left; Fits 2001-2004 Mitsubishi Montero Sport, Upstream Left; Fits 1998-2000 Mitsubishi Montero, Upstream Left; Fits 1999-2000 Mitsubishi Montero Sport, Upstream Left.
• Confirm connector routing and harness length against the original sensor before installation.
• Use the threaded mounting location and correct torque procedure for the exhaust bung.
• Inspect the exhaust system for leaks or damage that could affect sensor readings.

Quality Assurance

NTK is a major original equipment oxygen sensor manufacturer, and this Direct Fit Oxygen Sensor line is manufactured and tested to meet or exceed OE specifications. The 23524 is built for application-specific service on Mitsubishi Outlander, Eclipse, Montero, and Montero Sport models.