NTK 25146 Oxygen Sensor - Upstream

Direct-Fit Oxygen Sensor

NTK 25146 is a direct-fit heated oxygen sensor built for specific applications and threaded mounting. It is engineered for accurate exhaust monitoring and OE-style fit, form, and function.

Key Features

• Heated oxygen sensor for faster operating response.
• Specific-fit design for straightforward application matching.
• Threaded mounting with an 18 mm thread diameter.
• 4-wire configuration with a 16.75-inch wiring harness.
• NTK 25146 is manufactured and tested to meet or exceed OE specifications.

Detailed Description

NTK 25146 belongs to NTK’s Direct Fit Oxygen Sensor line, a product line focused on application-specific replacement sensors for import and domestic vehicles. NTK is part of the NGK family of products and is known for oxygen sensor coverage backed by ceramic manufacturing expertise. This sensor is designed to deliver the fit and electrical configuration expected for direct replacement service, making it a practical choice for emission control repairs on the Saab 9-3. The NTK 25146 part number is also referenced in cross-application listings, including Bosch 15036.

What It Is Used For

• Replacing a failed upstream oxygen sensor.
• Addressing check engine lights related to oxygen sensor performance.
• Restoring proper exhaust feedback for engine management.
• Correcting drivability issues tied to inaccurate air-fuel readings.

Installation Notes and Tips

Fits 2003 Saab 9-3, upstream. Confirm the bank and sensor location before installation, and verify connector and thread specifications against the removed part. The threaded design and specific-fit layout support direct replacement on the listed application.

Quality Assurance

NTK states that these oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. The brand also emphasizes OE application coverage and original-equipment oxygen sensor manufacturing expertise.