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Denso 234-4347 Oxygen Sensor - Downstream
| Brand | Denso 234-4347 |
|---|---|
| Position | Downstream |
| Wiring Harness Length | 9.06 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Gender | Female |
| Thread Diameter | 0.708 |
| Mounting Type | Threaded |
| Product line | OE Style |
| Fits | Hummer · 1 vehicle |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support faster operation and consistent performance.
Aluminum oxide trap layer. Protects the ceramic element from contamination.
Cross-references ACDelco 213-3542, Bosch 15698 and Delphi ES20320 for the same application. See all 7.
Denso OE Style Oxygen Sensor 234-4347
Denso 234-4347 is a heated, specific-fit oxygen sensor built to OE-style dimensions for direct replacement service. It is listed for the 2006 Hummer H3 downstream position and is engineered for accurate exhaust feedback, stable drivability, and proper fuel control.
The Denso OE Style line focuses on exact replacement fitment and factory-style performance. This oxygen sensor uses a threaded mounting design, a female connector, 4 wires, and a 9.06-inch wiring harness length for a clean installation on the specified application.
Key Features
- Specific-fit oxygen sensor for direct replacement on the listed application
- Heated sensor design for faster operating response
- 4-wire configuration with female connector
- Threaded mounting type with 0.708-inch thread diameter
- 9.06-inch wiring harness length
- OE Style construction for factory-like fit and function
- Fits 2006 Hummer H3, downstream
Detailed Description
This Denso oxygen sensor, part number 234-4347, is designed for the downstream location on the 2006 Hummer H3. As an OE Style replacement, it is precision built to match the original sensor layout and connection style, helping maintain proper exhaust monitoring and engine management performance. Denso also uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting long service life in demanding exhaust environments. If you are replacing a worn sensor on a 2006 Hummer H3 downstream application, 234-4347 provides a direct-fit solution with the correct connector and harness configuration.
This part cross-references ACDelco 213-3542 and Bosch 15698 for the same application.
Common Issues This Part May Address
- Check engine light related to oxygen sensor performance
- Incorrect air-fuel ratio feedback from a failing downstream sensor
- Reduced fuel efficiency caused by inaccurate exhaust readings
- Rougher engine operation tied to degraded sensor response
- Emissions test failures linked to sensor malfunction
Installation Notes and Tips
Verify the downstream location before installation and confirm connector style, wire count, and thread size against the original sensor. Inspect the harness routing and exhaust threads for damage or contamination before tightening the new sensor. For best results, clear diagnostic trouble codes after installation and confirm the repair with a scan tool if available.
Quality Assurance
Denso manufactures and tests this oxygen sensor to OE standards for fit and performance. The OE Style design is intended to deliver the correct part and the correct fit for the listed 2006 Hummer H3 downstream application.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2006 | Hummer | H3 | Downstream | OE Style |
| No rows match your filter. | ||||