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NTK 25059 Oxygen Sensor - Upstream
| Brand | NTK 25059 |
|---|---|
| Position | Upstream |
| Wiring Harness Length | 44.5000 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Thread Diameter | 18.000 |
| Mounting Type | Threaded |
| Product line | Direct Fit Oxygen Sensor |
| Fits | Alfa Romeo · 1 vehicle |
Direct fit design. Application-specific replacement with OE-style fit, form, and function.
Heated sensor. Built for faster operating response in emissions control systems.
NTK 25059. Part of the Direct Fit Oxygen Sensor line with tested OE-level quality.
Cross-references Bosch 13301, 75-1639 and 213-1413 for the same application. See all 6.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct Fit Oxygen Sensor
NTK 25059 is a direct fit oxygen sensor built for specific applications and engineered for OE-style fit, form, and function. It uses a heated, threaded design with a 4-wire configuration and a 44.5-inch harness length for the correct installation layout.
Key Features
- Direct fit oxygen sensor for specific applications
- Heated sensor design for faster operating response
- 4-wire configuration with threaded mounting
- 44.5-inch wiring harness length
- 18 mm thread diameter
- NTK 25059 part number for identification and ordering
Detailed Description
NTK 25059 is part of the Direct Fit Oxygen Sensor line, a product line focused on application-specific replacement sensors. NTK is part of the NGK family of products and is known for oxygen sensor manufacturing across import and domestic coverage. This sensor is built with ceramic-based technology and is extensively tested during production to support consistent quality and OE-level performance.
Compatible with 1994 Alfa Romeo 164, upstream. This part cross-references Bosch 13301 for the same application. For buyers searching for an Alfa Romeo 164 oxygen sensor or an upstream replacement oxygen sensor, NTK 25059 provides the correct direct-fit configuration.
What It Is Used For
- Replacing a worn or slow-responding oxygen sensor
- Restoring accurate exhaust oxygen feedback to the engine control system
- Addressing sensor-related fault codes or drivability concerns
- Correcting emissions monitoring issues caused by sensor degradation
Installation Notes and Tips
Verify the upstream location and OE-equivalent design before installation. Confirm the threaded mounting style, 4-wire layout, and harness length match the original sensor on the vehicle. Use the part number 25059 to confirm application details before ordering.
Quality Assurance
NTK states that its oxygen sensors are manufactured and tested to meet or exceed OE specifications. The brand also positions itself as a major original equipment oxygen sensor supplier, with production controls focused on fit, form, and function. Part number 25059 is part of that direct-fit program.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1994 | Alfa Romeo | 164 | 3.0L | V6 | Upstream | B1S1; To 6/94; OE Equivalent Design; Direct Fit Oxygen Sensor |
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