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Denso 234-4858 Oxygen Sensor - Downstream or Upstream
| Brand | Denso 234-4858 |
|---|---|
| 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 | 21.93 |
| Product line | OE Style |
| Fits | Kia · 6 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps maintain accurate emissions control and engine performance.
Threaded mount. Installs with a secure, specific-fit connection.
Cross-references ACDelco 213-2891, Bosch 15643 and Bosch 15644 for the same application. See all 12.
Denso OE Style Oxygen Sensor for Kia Spectra
Denso 234-4858 is an OE Style heated oxygen sensor built for precise replacement and consistent signal performance. It is a specific-fit sensor for 2002-2004 Kia Spectra applications, including upstream and downstream positions where listed.
Key Features
- OE Style replacement for direct-fit service
- Heated oxygen sensor design for faster operating readiness
- Specific fit for accurate installation on listed Kia Spectra applications
- 4-wire configuration with male connector
- Threaded mounting with 0.708 in. thread diameter
- 21.93 in. wiring harness length
- Built with Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination
Detailed Description
This Denso oxygen sensor is engineered to match the original equipment style used on the Kia Spectra, helping restore proper exhaust feedback for the engine control system. The heated sensor design supports quicker closed-loop operation, while the specific-fit construction and threaded mount help ensure the correct placement on 2002-2004 Kia Spectra upstream and downstream locations. Denso 234-4858 is also a practical OE-style replacement when servicing a 2003-2004 Kia Spectra or a 2002 Kia Spectra built from 05/22/01.
Denso’s OE Style line focuses on exact replacement fitment and tested construction for dependable service. This part cross-references Bosch 15643 and Delphi ES11077 for the same application.
What It Helps Address
- Check engine light concerns related to oxygen sensor performance
- Incorrect air-fuel feedback from a worn sensor
- Reduced fuel economy caused by delayed or inaccurate exhaust readings
- Rough idle or drivability issues tied to sensor signal degradation
- Exhaust sensor replacement needs on Kia Spectra upstream or downstream positions
Installation Notes and Tips
Verify the sensor position before ordering, since this part is listed for both upstream and downstream Kia Spectra applications. Confirm connector style, wire count, and thread size against the original sensor before installation. Use proper oxygen sensor service procedures to avoid damaging the wiring harness or sensing element during removal and tightening.
Quality Assurance
Denso manufactures and tests this oxygen sensor to OE standards for fit and performance. The OE Style product line is designed for direct replacement service with attention to first-time fit and long-term durability.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004 | Kia | Spectra | Upstream | OE Style |
| 2004 | Kia | Spectra | Downstream | OE Style |
| 2003 | Kia | Spectra | Upstream | OE Style |
| 2003 | Kia | Spectra | Downstream | OE Style |
| 2002 | Kia | Spectra | Upstream | From 05/22/01; OE Style |
| 2002 | Kia | Spectra | Downstream | From 05/22/01; OE Style |
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