NTK 25582 Oxygen Sensor - Upstream

Direct-Fit Oxygen Sensor

NTK 25582 is a direct-fit heated oxygen sensor built for specific applications with threaded mounting and a 4-wire design. It is engineered for accurate air-fuel feedback and OE-style fit, form, and function in import applications.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct replacement use
• 4-wire configuration with 43.25-inch harness length
• 18 mm thread diameter and threaded mounting type
• NTK 25582 part number for application matching

Detailed Description

NTK 25582 belongs to NTK’s Direct Fit Oxygen Sensor line, which focuses on application-specific replacement sensors rather than universal parts. As part of the NGK family, NTK applies ceramic sensor manufacturing expertise and OE-oriented engineering to deliver fit and function that align with original equipment requirements. This oxygen sensor is a strong match for Saab 9-3, Saab 900, Saab 9000, and Porsche 911 applications listed in the fitment data, including upstream locations where precise air-fuel monitoring is required. The NTK 25582 is built for direct replacement service and is cross-referenced to Bosch 13662 and DENSO 234-4185 for the same application.

What It Helps Address

• Faulty oxygen sensor readings
• Delayed closed-loop fuel control
• Check engine light concerns related to sensor performance
• Air-fuel ratio feedback issues at the upstream location
• Driveability problems caused by inaccurate exhaust oxygen measurement

Installation Notes and Tips

Verify the connector, harness length, thread diameter, and upstream position before installation. Confirm the vehicle application against the listed fitment data for Saab 9-3, Saab 900, Saab 9000, or Porsche 911. Use the part number 25582 to match the correct sensor configuration, and compare the existing sensor’s wire count and mounting style before replacement.

Quality Assurance

NTK tests these oxygen sensors during manufacturing to support quality and reliability that meet or exceed OE specifications. The brand is recognized as a major original equipment oxygen sensor supplier, and the 25582 reflects that OE-focused approach.