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NTK 25637 Oxygen Sensor - Upstream
| Brand | NTK 25637 |
|---|---|
| Position | Upstream |
| Wiring Harness Length | 72.5000 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 3 |
| Thread Diameter | 18.000 |
| Mounting Type | Threaded |
| Product line | Direct Fit Oxygen Sensor |
| Fits | Saab · 1 vehicle |
Direct fit design. Built for specific-fit replacement with OE-style form and function.
Heated sensor. Supports fast exhaust feedback for emission control operation.
OE-tested quality. Extensively tested during manufacturing to meet or exceed OE specifications.
Cross-references 75-2104, 213-1265 and 213-3114 for the same application. See all 9.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct Fit Oxygen Sensor
NTK Direct Fit Oxygen Sensor 25637 is a specific-fit, heated oxygen sensor built for emission control service. It is engineered with a threaded mounting style, 3-wire design, and 72.5-inch harness length for a direct replacement application.
Key Features
- Heated oxygen sensor for precise air-fuel ratio feedback
- Specific-fit design for direct replacement service
- Threaded mounting type for secure installation
- 3-wire configuration for signal and heater circuit operation
- 18 mm thread diameter and 72.5-inch wiring harness length
Detailed Description
NTK 25637 is part of the Direct Fit Oxygen Sensor line, built to match OE-style fit, form, and function. NTK is known for oxygen sensor manufacturing and uses ceramic technology from raw material through finished sensor production. This sensor is extensively tested during manufacturing to meet or exceed OE specifications, making it a practical choice for emission system repair on the Saab 9000 and other confirmed applications. This part cross-references Monroe Shocks & Struts (e.g., 75-2104, 213-1265) for the same application.
Fits 1993 Saab 9000, upstream.
What It Is Used For
- Replacing a failed oxygen sensor that triggers check engine light concerns
- Restoring air-fuel ratio feedback for emission control operation
- Addressing drivability issues tied to inaccurate exhaust oxygen readings
- Correcting heater circuit faults in a heated sensor application
- Servicing a threaded direct-fit sensor location on the exhaust system
Installation Notes and Tips
Verify the connector, thread size, and harness length before installation. Use the confirmed upstream fitment for the Saab 9000 and follow factory service procedures for removal and torque specifications. Inspect the wiring route and exhaust threads for damage before installing the new sensor.
Quality Assurance
NTK states that these oxygen sensors are extensively tested during manufacturing and built 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.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1993 | Saab | 9000 | 2.3L | L4 | Upstream | OE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor |
| No rows match your filter. | ||||||