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Denso 234-5172 Air / Fuel Ratio Sensor - Upstream
| Brand | Denso 234-5172 |
|---|---|
| Position | Upstream |
| Connector Gender | Male |
| Grade Type | Regular |
| Sensor Type | Heated |
| Thread Diameter | 0.708 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 5 |
| Wiring Harness Length | 11.46 |
| Product line | OE Style |
| Fits | Ford · 7 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Engineered for reliable air-fuel ratio monitoring.
Specific fit. Made to match the application with no modifications needed.
Cross-references Bosch 17259, Ford DS7Z9F472B and NTK 24334 for the same application. See all 5.
Denso OE Style Air/Fuel Ratio Sensor
This Denso OE Style air/fuel ratio sensor is a specific-fit replacement built for precise signal control and direct installation on select Ford Fusion applications. It is a heated upstream sensor with a 5-wire design and male connector, made to match OE-style requirements for accurate air-fuel monitoring.
Compatible with Ford Fusion models from 2014-2020 in the upstream position, this Denso 234-5172 is a direct-fit choice for drivers replacing a worn sensor on the 2.0L/engine-management side of the emissions system. The Denso 234-5172 is built for exact replacement fitment and first-time installation alignment.
Key Features
- OE Style replacement air/fuel ratio sensor
- Heated sensor design for faster operating readiness
- Specific fit for select Ford Fusion upstream applications
- 5-wire configuration with male connector
- Wiring harness length: 11.46
- Thread diameter: 0.708
- Regular grade type for direct replacement service
Product Details
Denso manufactures this air/fuel ratio sensor to OE-level standards for consistent signal performance and accurate emissions-system feedback. As an OE Style part, it is engineered for the correct fit and connector layout needed on the Ford Fusion upstream location, helping restore proper sensor response after the original unit ages or fails. This part number, 234-5172, is also referenced by Bosch 17259 and NTK 24334 for the same application.
Common Issues This Sensor May Address
- Check engine light related to air/fuel ratio sensor performance
- Rough idle caused by inaccurate upstream sensor readings
- Fuel trim faults from delayed or inconsistent sensor response
- Emissions test failure tied to sensor degradation
- Poor drivability from incorrect air-fuel feedback
Installation Notes and Tips
Install this sensor in the upstream position only on the listed Ford Fusion applications. Verify connector style, thread diameter, and harness length before installation to confirm proper routing and fit. Because this is a specific-fit sensor, matching the vehicle year and position is important for correct operation. The Denso 234-5172 is intended for direct replacement use on compatible Ford Fusion models.
Quality Assurance
Denso tests these sensors to strict OE standards and builds each component for accurate replacement fitment. The OE Style product line focuses on direct-fit parts that match original equipment requirements for dependable service and correct installation on the first attempt.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2020 | Ford | Fusion | Upstream | OE Style |
| 2019 | Ford | Fusion | Upstream | OE Style |
| 2018 | Ford | Fusion | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2017 | Ford | Fusion | Upstream | OE Style |
| 2016 | Ford | Fusion | Upstream | OE Style |
| 2015 | Ford | Fusion | Upstream | OE Style |
| 2014 | Ford | Fusion | Upstream | OE Style |
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