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Denso 234-4421 Oxygen Sensor - Downstream
| Brand | Denso 234-4421 |
|---|---|
| Position | Downstream |
| Connector Gender | Male |
| Mounting Type | Threaded |
| Sensor Type | Heated |
| Thread Diameter | 0.708 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 23.03 |
| Product line | OE Style |
| Fits | Chevrolet and Suzuki · 2 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support quicker operation and consistent readings.
Threaded mounting. Specific-fit design with a male connector and 4-wire harness.
Cross-references ACDelco 213-3956, Bosch 15085 and Bosch 15492 for the same application. See all 10.
Denso OE Style Oxygen Sensor 234-4421
Denso 234-4421 is a specific-fit heated oxygen sensor built for OE-style replacement on select applications. It is engineered for the downstream position on 2004-2005 Suzuki Verona models, with the exact connector, thread, and harness layout needed for a direct replacement.
Key Features
- OE Style replacement from Denso
- Specific fit for downstream installation
- Heated oxygen sensor design for faster operating response
- 4-wire configuration with male connector
- Threaded mounting with 0.708 in. thread diameter
- Wiring harness length: 23.03 in.
Product Details
Denso 234-4421 is manufactured and tested to OE standards for accurate sensor performance and first-time fitment. This oxygen sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and long service life. For drivers searching for a downstream oxygen sensor for 2004-2005 Suzuki Verona, or an OE-style replacement oxygen sensor for Suzuki Verona downstream applications, this part is built to match the original configuration.
This part cross-references ACDelco 213-3956 and Bosch 15085 for the same application. It also aligns with OE-style replacement needs for Suzuki Verona and is identified by part number 234-4421.
Common Issues Addressed
- Check engine light related to oxygen sensor performance
- Incorrect air-fuel ratio readings from a worn downstream sensor
- Reduced fuel economy caused by slow or inaccurate sensor response
- Emissions test failures tied to sensor degradation
- Rough engine operation from contaminated or aging sensor elements
Installation Notes and Tips
Verify the downstream location before installation and confirm connector style, wire count, and thread size match the original sensor. The threaded mounting design and specific-fit harness help simplify replacement on the intended Suzuki Verona applications. Always inspect the exhaust bung threads and wiring routing before final tightening.
Quality Assurance
Denso manufactures this OE Style oxygen sensor to strict original-equipment standards and tests each unit for fit and performance consistency. The 234-4421 is built as a direct replacement for the confirmed 2004-2005 Suzuki Verona downstream application.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Suzuki | Verona | Downstream | OE Style |
| 2004 | Suzuki | Verona | Downstream | OE Style |
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