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Denso 234-4345 Oxygen Sensor - Downstream or Upstream Right
| Brand | Denso 234-4345 |
|---|---|
| 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 | 14.69 |
| Product line | OE Style |
| Fits | Chevrolet and GMC · 12 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support faster operation and consistent performance.
Threaded mounting. Female connector and 4-wire design for a straightforward install.
Cross-references ACDelco 213-1532, ACDelco 213-2831 and BorgWarner OS1690 for the same application. See all 11.
Denso 234-4345 Oxygen Sensor Overview
Denso 234-4345 is an OE Style heated oxygen sensor built for direct replacement on select Chevrolet Astro and GMC Safari applications. It is engineered for specific fitment, with a 4-wire female connector, threaded mounting, and a 14.69-inch wiring harness for a factory-style installation.
For drivers searching for a 2003-2005 Chevrolet Astro oxygen sensor or a 2003-2005 GMC Safari oxygen sensor, this Denso part number 234-4345 is built to match the original sensor layout and connection style.
Key Features
- OE Style replacement oxygen sensor for direct-fit service
- Heated sensor design for faster operating response
- Specific fit application with threaded mounting
- 4-wire configuration with female connector
- 14.69-inch wiring harness length
- 0.708-inch thread diameter
OE Style Construction
Denso’s OE Style line is built to match original equipment dimensions and electrical requirements for a first-time fit. The sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and long service life. This makes Denso 234-4345 a practical choice when replacing a worn upstream right or downstream oxygen sensor on Chevrolet Astro and GMC Safari models.
This part cross-references Bosch 15898 and NTK 21049 for the same application.
Common Issues This Sensor Can Address
- Check engine light related to oxygen sensor performance
- Rough idle or inconsistent air-fuel control
- Reduced fuel economy from an aging sensor
- Slow sensor response during closed-loop operation
- Emissions test failure caused by a faulty O2 sensor
Installation Notes and Tips
Verify the sensor position before ordering, since this application covers upstream right and downstream locations. Confirm connector style, thread diameter, and harness length against the original part before installation. Use proper oxygen sensor service tools and inspect the exhaust threads for damage or contamination before threading in the replacement sensor.
Quality Assurance
Denso manufactures and tests this oxygen sensor to OE standards for exact replacement fit and dependable operation. The OE Style design is intended to deliver the correct part and fit for the listed Chevrolet Astro and GMC Safari applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Chevrolet | Astro | Upstream Right | OE Style |
| 2005 | Chevrolet | Astro | Downstream | OE Style |
| 2005 | GMC | Safari | Upstream Right | OE Style |
| 2005 | GMC | Safari | Downstream | OE Style |
| 2004 | Chevrolet | Astro | Upstream Right | OE Style |
| 2004 | Chevrolet | Astro | Downstream | OE Style |
| 2004 | GMC | Safari | Upstream Right | OE Style |
| 2004 | GMC | Safari | Downstream | OE Style |
| 2003 | Chevrolet | Astro | Upstream Right | OE Style |
| 2003 | Chevrolet | Astro | Downstream | OE Style |
| 2003 | GMC | Safari | Upstream Right | OE Style |
| 2003 | GMC | Safari | Downstream | OE Style |
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