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Denso 234-4187 Oxygen Sensor - Downstream
| Brand | Denso 234-4187 |
|---|---|
| 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 | 15.43 |
| Product line | OE Style |
| Fits | Lincoln · 3 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 15717, Delphi ES20014 and Ford 1R3Z9G444BA for the same application. See all 8.
Denso OE Style Oxygen Sensor 234-4187
The Denso 234-4187 is a heated, specific-fit oxygen sensor built to OE-style dimensions for direct replacement service. It is engineered for the 2003-2005 Lincoln Aviator downstream position and is designed to deliver accurate exhaust feedback for consistent engine management.
For buyers searching for a downstream oxygen sensor for a 2003-2005 Lincoln Aviator, this Denso OE Style part number 234-4187 matches the application with the correct threaded mounting, 4-wire configuration, and male connector layout.
Key Features
- Heated oxygen sensor for faster operating response
- Specific-fit design for direct replacement on the listed application
- Threaded mounting type with 0.708 in. thread diameter
- 4-wire design with male connector
- Wiring harness length: 15.43 in.
- OE Style construction for factory-like fit and function
Product Details
Denso OE Style oxygen sensors are manufactured and tested to OE standards, with precision-built dimensions for exact replacement fitment. This sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable sensor operation and long service life. The 234-4187 is a direct-fit downstream oxygen sensor for the Lincoln Aviator and is also cross-referenced to Bosch 15717 for the same application.
Compatible With 2003-2005 Lincoln Aviator, downstream. The Denso 234-4187 is a practical choice when replacing a worn sensor that can affect fuel control and exhaust monitoring on this vehicle.
Common Issues This Part May Address
- Check engine light related to oxygen sensor performance
- Incorrect air-fuel ratio feedback from a degraded downstream sensor
- Reduced fuel economy caused by inaccurate exhaust readings
- Rough engine operation tied to aging emissions sensors
- Failed emissions inspection due to sensor-related faults
Installation Notes and Tips
Verify the downstream location and connector match before installation. Confirm the threaded mounting size and harness routing on the vehicle to ensure proper fitment. For best results, inspect the exhaust threads and connector terminals during replacement and clear any stored diagnostic trouble codes after installation.
Quality Assurance
Denso builds this OE Style oxygen sensor to strict factory-level standards for fit and performance. The precision replacement design and contamination-resistant sensor protection are intended to support reliable operation on the listed Lincoln Aviator applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Lincoln | Aviator | Downstream | OE Style |
| 2004 | Lincoln | Aviator | Downstream | OE Style |
| 2003 | Lincoln | Aviator | Downstream | OE Style |
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