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Denso 234-4466 Oxygen Sensor - Downstream
| Brand | Denso 234-4466 |
|---|---|
| Position | Downstream |
| Wiring Harness Length | 28.35 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Gender | Male |
| Thread Diameter | 0.708 |
| Mounting Type | Threaded |
| Product line | OE Style |
| Fits | Mazda · 3 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support quicker operation and consistent performance.
Threaded mounting. Installs with a secure, specific-fit connection.
Cross-references Bosch 18040, Mazda L55618861 and Mazda L55618861A for the same application. See all 6.
Denso 234-4466 Oxygen Sensor for Mazda CX-7
Denso 234-4466 is an OE-style heated oxygen sensor built for precise replacement and direct fitment. It is engineered for the downstream position on 2010-2012 Mazda CX-7 models, with a specific-fit design that supports accurate exhaust monitoring and stable engine management.
Key Features
- Heated oxygen sensor for downstream exhaust placement
- Specific-fit design for direct replacement on the listed application
- 4-wire configuration with male connector
- 28.35-inch wiring harness length
- Threaded mounting with 0.708-inch thread diameter
- OE Style construction from Denso
OE Style Design and Function
Denso’s OE Style line is built around exact replacement fitment and factory-style performance. The 234-4466 oxygen sensor is manufactured and tested to OE-level standards, with attention to connector layout, harness length, and threaded mounting for a first-time fit on the Mazda CX-7. Denso also uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent sensor response and long service life.
This part cross-references Bosch 18040 for the same application.
Vehicle Fitment
- Fits 2010-2012 Mazda CX-7, Downstream, OE Style
Common Issues This Sensor May Address
- Check engine light related to downstream oxygen sensor performance
- Incorrect exhaust oxygen readings affecting fuel control
- Reduced fuel economy caused by a failing sensor signal
- Slow sensor response from heat-related wear or contamination
- Emissions test failures tied to oxygen sensor faults
Installation Notes and Tips
Confirm the downstream sensor location before installation and match the connector, wire count, and thread size to the original unit. Inspect the exhaust bung threads and wiring route before tightening the sensor, and verify there is enough harness length to avoid strain or contact with hot exhaust components. For best results, clear diagnostic trouble codes after installation and confirm proper operation with a scan tool.
Quality Assurance
Denso manufactures and tests this oxygen sensor to strict OE standards for accurate replacement fitment and dependable operation. The OE-style design is intended to deliver the right part and the right fit for the listed Mazda CX-7 application.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2012 | Mazda | CX-7 | Downstream | OE Style |
| 2011 | Mazda | CX-7 | Downstream | OE Style |
| 2010 | Mazda | CX-7 | Downstream | OE Style |
| No rows match your filter. | ||||