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Denso 234-4502 Oxygen Sensor - Downstream Right
| Brand | Denso 234-4502 |
|---|---|
| Position | Downstream Right |
| Connector Gender | Female |
| Mounting Type | Threaded |
| Sensor Type | Heated |
| Thread Diameter | 0.708 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 20.67 |
| Product line | OE Style |
| Fits | Toyota and Lexus · 8 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support quicker operation and efficient engine performance.
Aluminum oxide trap layer. Protects the ceramic element for longer service life.
Cross-references ACDelco 213-3873, Bosch 15105 and Delphi ES20226 for the same application. See all 7.
Denso 234-4502 Oxygen Sensor
The Denso 234-4502 is a heated oxygen sensor built to OE-style specifications for direct replacement in select Toyota and Lexus applications. It is engineered for a specific fit and uses a 4-wire, female connector design with a threaded mounting style for accurate installation.
Key Features
- Heated oxygen sensor for precise exhaust monitoring
- Specific-fit design for direct replacement
- 4-wire configuration with female connector
- Threaded mounting type with 0.708 in. thread diameter
- Wiring harness length: 20.67 in.
- OE Style Denso replacement part number 234-4502
OE Style Construction
Denso’s OE Style line is built and tested to strict original-equipment standards, with precision dimensions for first-time fitment. The sensor also 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. This part cross-references Toyota 8946548200 for the same application.
Vehicle Fitment
- Fits 2006-2010 Toyota Highlander, Downstream Right.
- Fits 2006-2008 Lexus RX400h, Downstream Right.
Common Repair Symptoms
- Check engine light related to oxygen sensor performance
- Incorrect air-fuel ratio readings
- Reduced fuel economy from faulty exhaust feedback
- Rough idle or drivability issues tied to sensor signal loss
- Failed emissions inspection due to sensor malfunction
Installation Notes
Confirm downstream right placement before ordering and match the connector, wire count, and thread size to the original sensor. For best results, inspect the harness routing and exhaust threads before installation, and verify the repair with a scan tool after clearing fault codes. This part is a direct-fit replacement for select 2006-2010 Toyota Highlander and 2006-2008 Lexus RX400h applications.
Quality Assurance
Denso manufactures this oxygen sensor to OE-style standards and tests each unit for fit and performance consistency. The 234-4502 is designed as a direct replacement for the specified Toyota and Lexus applications.
| Year | Make | Model | Fuel Type | Position | Notes |
|---|---|---|---|---|---|
| 2010 | Toyota | Highlander | — | Downstream Right | OE Style |
| 2009 | Toyota | Highlander | — | Downstream Right | OE Style |
| 2008 | Lexus | RX400h | — | Downstream Right | OE Style |
| 2008 | Toyota | Highlander | — | Downstream Right | OE Style |
| 2007 | Lexus | RX400h | — | Downstream Right | OE Style |
| 2007 | Toyota | Highlander | ELECTRIC/GAS | Downstream Right | OE Style |
| 2006 | Lexus | RX400h | — | Downstream Right | OE Style |
| 2006 | Toyota | Highlander | ELECTRIC/GAS | Downstream Right | OE Style |
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