NTK 23517 Oxygen Sensor - Upstream

Direct-Fit Oxygen Sensor

This NTK oxygen sensor is a specific-fit replacement built for emission control service. It uses a heated, threaded design with a 4-wire configuration and a 12.7500-inch harness for a direct-fit installation.

• Heated oxygen sensor for responsive exhaust monitoring.
• Specific-fit design for straightforward replacement service.
• Threaded mounting with 18.000 thread diameter.
• 12.7500-inch wiring harness and 4-wire layout.

Fitment Details

Compatible with 1997-2000 Mitsubishi Montero Sport, upstream. This application is listed as a B1S1 oxygen sensor for Federal Emissions with OE-equivalent design. NTK 23517 is the part number for this direct-fit oxygen sensor, and 23517 is also the reference to use when verifying the application.

What It Helps Address

• Faulty oxygen sensor readings.
• Check engine light concerns related to air-fuel monitoring.
• Reduced fuel control accuracy from a worn sensor.
• Emission system service needs on the listed application.

Installation Notes

Use the threaded mounting style and verify harness routing before installation. Confirm the upstream location and Federal Emissions application match the vehicle before ordering. The 4-wire heated design should be matched to the original connector and sensor specification.

Quality Assurance

NTK is part of the NGK family of products and is a major original equipment oxygen sensor supplier. Each sensor is extensively tested during manufacturing to meet or exceed OE specifications for fit, form, and function.