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NTK 22091 Oxygen Sensor - Downstream
| Brand | NTK 22091 |
|---|---|
| Position | Downstream |
| Wiring Harness Length | 15.7500 |
| 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 | Mazda · 2 vehicles |
Direct fit design. Matches specific applications for a factory-style oxygen sensor replacement.
Heated sensor. Reaches operating temperature efficiently for responsive exhaust feedback.
OE-focused testing. Manufactured to meet or exceed original equipment specifications.
Cross-references Bosch 13967, DENSO Auto Parts 234-4041 and 75-3409 for the same application. See all 6.
Direct Fit Oxygen Sensor for Mazda 626
The NTK 22091 is a direct fit heated oxygen sensor built for specific applications on the Mazda 626. It uses a threaded mounting design and a 4-wire configuration to match the original sensor layout for the listed downstream application.
Key Features
- Direct fit oxygen sensor for specific vehicle applications
- Heated sensor design for faster operating response
- 4-wire construction for OE-style signal and heater circuit layout
- Threaded mounting type with 18 mm thread diameter
- 15.75-inch wiring harness length
- NTK 22091 part number for catalog and fitment lookup
Detailed Description
NTK 22091 is part of the Direct Fit Oxygen Sensor line, engineered for exact application matching rather than universal adaptation. For 1998-1999 Mazda 626 downstream use, this sensor is specified as B1S2 with California emissions coverage and OE manufacturer reference to NTK. The heated design helps the sensor reach operating temperature efficiently, while the threaded mount and harness length support a factory-style replacement layout. NTK 22091 is backed by NTK’s OE-focused manufacturing approach and extensive testing for quality and reliability that meets or exceeds OE specifications.
What It Is Used For
- Replacing a failed downstream oxygen sensor on the Mazda 626
- Restoring accurate exhaust oxygen feedback for engine management
- Addressing check engine light concerns related to sensor performance
- Correcting emissions-related faults on California emissions applications
- Replacing a sensor with worn heater or signal circuit performance
Installation Notes and Tips
Verify the downstream location, B1S2 application, and California emissions note before ordering. Confirm the 18 mm threaded mounting style and 4-wire connector layout match the original sensor. Use the part number 22091 and the vehicle application details to confirm the correct replacement before installation.
Quality Assurance
NTK is part of the NGK family of products and is recognized as a major original equipment oxygen sensor supplier. NTK 22091 is manufactured and tested to meet or exceed OE specifications for fit, form, and function.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1999 | Mazda | 626 | 2.0L | L4 | Downstream | B1S2; Calif. Emissions; OE MFR: NTK; Direct Fit Oxygen Sensor |
| 1998 | Mazda | 626 | 2.0L | L4 | Downstream | B1S2; Calif. Emissions; OE MFR: NTK; Direct Fit Oxygen Sensor |
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