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Denso 234-4396 Oxygen Sensor - Upstream
| Brand | Denso 234-4396 |
|---|---|
| Position | Upstream |
| Connector Gender | Female |
| Mounting Type | Threaded |
| Sensor Type | Heated |
| Thread Diameter | 0.708 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 18.11 |
| Product line | OE Style |
| Fits | Mazda · 6 vehicles |
OE style. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support faster operation and consistent performance.
Threaded mounting. Provides a secure, specific-fit installation.
Cross-references ACDelco 213-3888, Bosch 13769 and Delphi ES20389 for the same application. See all 9.
Denso 234-4396 Oxygen Sensor Overview
Denso 234-4396 is an OE Style heated oxygen sensor built for specific-fit replacement on select Mazda applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on the vehicles listed below.
Compatible with 2004-2005 Mazda 3 upstream and 2006-2007 Mazda 5 upstream, this sensor is a direct replacement for the original unit. The Denso OE Style line is built to match factory fit and function, with attention to connector design, thread size, and harness length.
Key Features
- Heated oxygen sensor for faster operating readiness
- Specific-fit design for direct replacement
- 4-wire configuration with female connector
- Threaded mounting type with 0.708 thread diameter
- 18.11 wiring harness length for OE-style routing
- Built to strict OE standards for fit and performance
- Part number: 234-4396
OE Style Line Details
Denso’s OE Style product line focuses on replacement parts that mirror original equipment dimensions and connection points. For this Mazda 3 and Mazda 5 upstream oxygen sensor application, that means the sensor is precision built to match the factory layout and support consistent exhaust monitoring. The Denso 234-4396 also uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting long service life and stable engine performance.
This part cross-references Bosch 13769 and NTK 24234 for the same application.
What This Oxygen Sensor Helps Address
- Check engine light related to oxygen sensor performance
- Incorrect air-fuel mixture readings
- Poor fuel economy caused by inaccurate exhaust feedback
- Rough idle or drivability issues tied to sensor response
- Slow sensor warm-up on heated upstream applications
Installation Notes
Install this sensor in the upstream position only for the listed Mazda applications. Verify connector style, thread diameter, and harness routing before installation. Because this is a specific-fit part, it should align with the original mounting location and wiring layout on 2004-2005 Mazda 3 and 2006-2007 Mazda 5 models.
Quality Assurance
Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and function. The OE Style design is intended to deliver the correct part and the correct fit for the listed Mazda 3 and Mazda 5 applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2007 | Mazda | 5 | Upstream | OE Style |
| 2006 | Mazda | 5 | Upstream | OE Style |
| 2005 | Mazda | 3 | Upstream | OE Style |
| 2005 | Mazda | 3 | Upstream | Canada & Exc. Calif.; OE Style |
| 2004 | Mazda | 3 | Upstream | OE Style |
| 2004 | Mazda | 3 | Upstream | Canada & Exc. Calif.; OE Style |
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