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Denso 234-4348 Oxygen Sensor - Downstream
| Brand | Denso 234-4348 |
|---|---|
| Position | Downstream |
| Connector Gender | Female |
| Mounting Type | Threaded |
| Sensor Type | Heated |
| Thread Diameter | 0.708 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 12.13 |
| Product line | OE Style |
| Fits | Buick, Chevrolet, GMC, Isuzu, and Saab · 11 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support faster operation and consistent emissions control.
Threaded mounting. Installs with a secure, specific-fit connection.
Cross-references ACDelco 213-3139, ACDelco 213-3868 and Bosch 15132 for the same application. See all 12.
Denso OE Style Oxygen Sensor 234-4348
Denso 234-4348 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for downstream applications on select 2006 Buick, Chevrolet, GMC, Isuzu, and Saab vehicles, including the Rainier, Colorado, Trailblazer, Canyon, Envoy, Ascender, i-280, i-350, and 9-7x.
Key Features
- Heated oxygen sensor with a specific-fit design
- 4-wire configuration with a female connector
- Threaded mounting type for direct replacement use
- Wiring harness length: 12.13
- Thread diameter: 0.708
- OE Style construction for accurate fit and function
OE Style Construction
Denso’s OE Style line is built to match original equipment requirements for fit, form, and function. Part number 234-4348 uses precision-built components and an aluminum oxide trap layer that helps protect the ceramic element from silicone and lead contamination, supporting stable sensor performance and long service life. This part cross-references Bosch 15132 and NTK 21023 for the same application.
Vehicle Fitment
- Fits 2006 Buick Rainier, Downstream, OE Style
- Fits 2006 Chevrolet Colorado, Downstream, OE Style
- Fits 2006 Chevrolet Trailblazer, Downstream, OE Style
- Fits 2006 Chevrolet Trailblazer EXT, Downstream, OE Style
- Fits 2006 GMC Canyon, Downstream, OE Style
- Fits 2006 GMC Envoy, Downstream, OE Style
- Fits 2006 GMC Envoy XL, Downstream, OE Style
- Fits 2006 Isuzu Ascender, Downstream, OE Style
- Fits 2006 Isuzu i-280, Downstream, OE Style
- Fits 2006 Isuzu i-350, Downstream, OE Style
- Fits 2006 Saab 9-7x, Downstream, OE Style
Common Replacement Uses
- Replacing a failed downstream oxygen sensor
- Addressing check engine light concerns related to sensor output
- Restoring air-fuel monitoring accuracy after sensor contamination
- Correcting drivability issues tied to aging exhaust sensors
- Replacing an OE-style sensor on 2006 Buick Rainier, Chevrolet Trailblazer, and GMC Envoy applications
Installation Notes
Confirm downstream placement, connector style, wire count, and thread diameter before installation. Use the vehicle’s original routing and mounting points to avoid harness strain, and verify the sensor connector seats fully before clearing diagnostic codes. For 2006 Chevrolet Colorado, GMC Canyon, and Saab 9-7x applications, match the OE-style configuration to the original sensor location.
Quality Assurance
Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement performance. The 234-4348 is built for direct-fit service on the listed applications and is designed to deliver the correct part and fit for the vehicle.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2006 | Buick | Rainier | Downstream | OE Style |
| 2006 | Chevrolet | Colorado | Downstream | OE Style |
| 2006 | Chevrolet | Trailblazer | Downstream | OE Style |
| 2006 | Chevrolet | Trailblazer EXT | Downstream | OE Style |
| 2006 | GMC | Canyon | Downstream | OE Style |
| 2006 | GMC | Envoy | Downstream | OE Style |
| 2006 | GMC | Envoy XL | Downstream | OE Style |
| 2006 | Isuzu | Ascender | Downstream | OE Style |
| 2006 | Isuzu | i-280 | Downstream | OE Style |
| 2006 | Isuzu | i-350 | Downstream | OE Style |
| 2006 | Saab | 9-7x | Downstream | OE Style |
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