AUTOMOTIVE PART
NTK Oxygen Sensor 21023
Oxygen Sensor, OE Type
Part 21023NTKOxygen Sensor
Match your exact vehicle configuration to the verified applications below.
Confirm the year, make, model, engine, drivetrain and required position before ordering.
Confirm the year, make, model, engine, drivetrain and required position before ordering.
Is This the Right Part?
Manufacturer Part Number21023
ManufacturerNTK
Part TypeOxygen Sensor
Part Details
Part Specifications
| California Proposition 65 | WARNING/Precaucion: Cancer and Reproductive Harm - Cancer y dano |
|---|---|
| Connector Gender | Male |
| Connector Shape | Square |
| Fitment | Specific |
| Grade Type | Standard Replacement |
| Heated | Yes |
| Mounting Type | Threaded |
| Prop65 | Cancer and Reproductive |
| Sensor Type | Narrow-Band |
| Thread Diameter | 18.00 MM |
| Thread Size | M18 - 1.5 |
| Wire Quantity | 4 |
| Wiring Harness Length | 12.25 IN |
| Wrench Size | 7/8" (22mm) |
Verified Vehicle Fitment
Make: Buick, Chevrolet, GMC, Isuzu, Pontiac, Saab
Model: 15 verified models — see exact combinations below.
Years: 2006, 2008–2009 — varies by model and configuration.
Check before ordering: Match the year, make, model, position, and every engine, transmission or other restriction in the same row. Listed years do not apply to every model.
View vehicle applications (16 configuration groups)
| Years | Make | Model | Position | Engine / transmission / notes |
|---|---|---|---|---|
| 2008–2009 | Buick | Allure | Downstream | Engine: 5.3 V8; B1S2, OE MFR: NTK |
| 2008–2009 | Buick | LaCrosse | Downstream | Engine: 5.3 V8; B1S2, OE MFR: NTK |
| 2006 | Buick | Rainier | Downstream | Engine: 4.2 L6; B1S2, OE MFR: NTK |
| 2006 | Chevrolet | Colorado | Downstream | B1S2, OE MFR: NTK |
| 2008–2009 | Chevrolet | Impala | Downstream | Engine: 5.3 V8; B1S2, OE MFR: NTK |
| 2006 | Chevrolet | Trailblazer | Downstream | Engine: 4.2 L6; B1S2, OE MFR: NTK |
| 2006 | Chevrolet | Trailblazer EXT | Downstream | Engine: 4.2 L6; B1S2, OE MFR: NTK |
| 2006 | GMC | Canyon | Downstream | B1S2, OE MFR: NTK |
| 2006 | GMC | Envoy | Downstream | Engine: 4.2 L6; B1S2, OE MFR: NTK |
| 2006 | GMC | Envoy XL | Downstream | Engine: 4.2 L6; B1S2, OE MFR: NTK |
| 2006 | Isuzu | Ascender | Downstream | Engine: 4.2 L6; B1S2, OE MFR: NTK |
| 2006 | Isuzu | i-280 | Downstream | B1S2, OE MFR: NTK |
| 2006 | Isuzu | i-350 | Downstream | B1S2, OE MFR: NTK |
| 2006 | Isuzu | i-350 | Downstream | OE TYPE OXYGEN SENSOR, OE MFR: NTK, B1S2 |
| 2008 | Pontiac | Grand Prix | Downstream | Engine: 5.3 V8; B1S2, OE MFR: NTK |
| 2006 | Saab | 9-7x | Downstream | Engine: 4.2 L6; B1S2, OE MFR: NTK |
Source: supplier-verified applications for NTK 21023. A vehicle not listed is not confirmed compatible.
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