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Denso 234-4349 Oxygen Sensor - Downstream
| Brand | Denso 234-4349 |
|---|---|
| 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 | 10.63 |
| Product line | OE Style |
| Fits | Mazda · 8 vehicles |
OE-style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support efficient engine performance and fuel economy.
Aluminum oxide trap layer. Protects the ceramic element from silicone and lead contamination.
Cross-references Bosch 13772, Bosch 15043 and Delphi ES20068 for the same application. See all 11.
Denso OE Style Oxygen Sensor for Mazda RX-8
Denso 234-4349 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for the downstream position on the Mazda RX-8 and supports accurate exhaust feedback for consistent engine operation.
Key Features
- OE Style replacement oxygen sensor from Denso
- Heated sensor design for faster operating readiness
- Specific fit for the downstream location
- 4-wire configuration with male connector
- Threaded mounting with 0.708 in. thread diameter
- 10.63 in. wiring harness length
- Built to OE standards for precise fit and function
Product Details
Denso 234-4349 is part of Denso’s OE Style line, which focuses on direct-fit replacement components for vehicles that require factory-style sensor performance. This oxygen sensor uses Denso’s precision-built construction and an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable sensor response and long service life. It is a direct replacement for 2004-2011 Mazda RX-8 downstream applications, including 2004 Mazda RX-8, downstream and 2011 Mazda RX-8, downstream. This part cross-references Bosch 13772 and NTK 22506 for the same application.
What It Helps Address
- Check engine light related to downstream oxygen sensor faults
- Incorrect exhaust oxygen readings
- Reduced fuel economy from a failing sensor
- Rough or inconsistent engine performance caused by sensor degradation
- Slow sensor response after extended heat exposure
Installation Notes and Tips
Verify the downstream sensor location before ordering and match the connector, wire count, and threaded mounting style to the original part. For Mazda RX-8 oxygen sensor replacement, confirm the harness length and thread diameter against the factory sensor to ensure proper routing and installation. Use the vehicle’s service procedure for removal and tightening.
Quality Assurance
Denso manufactures and tests this oxygen sensor to OE standards for accurate fit and dependable operation. The OE Style design is intended to deliver the correct part and fit for the listed Mazda RX-8 applications, with attention to sensor protection and replacement accuracy.
| Year | Make | Model | Transmission | Position | Notes |
|---|---|---|---|---|---|
| 2011 | Mazda | RX-8 | Automatic | Downstream | OE Style |
| 2010 | Mazda | RX-8 | Automatic | Downstream | OE Style |
| 2009 | Mazda | RX-8 | Automatic | Downstream | OE Style |
| 2008 | Mazda | RX-8 | — | Downstream | OE Style |
| 2007 | Mazda | RX-8 | — | Downstream | OE Style |
| 2006 | Mazda | RX-8 | — | Downstream | OE Style |
| 2005 | Mazda | RX-8 | — | Downstream | OE Style |
| 2004 | Mazda | RX-8 | — | Downstream | OE Style |
| No rows match your filter. | |||||