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Walker 350-34678 Oxygen Sensor - Downstream
| Brand | Walker 350-34678 |
|---|---|
| Position | Downstream |
| Heated | Yes |
| Wiring Harness Length | 900 |
| Wire Gauge Measurement | 20 |
| Sensor Type | Narrow-band |
| Terminal Type | Spade |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Shape | Oblong |
| Terminal Quantity | 4 |
| Connector Gender | Female |
| Terminal Gender | Female |
| Wrench Size | 22 |
| Thread Size | M18 - 1.5 |
| Overall Length | 925 |
| Mounting Type | Threaded |
| Product line | OE Replacement |
| Fits | Ford · 5 vehicles |
OE replacement. Engineered as an original-equipment-style oxygen sensor replacement.
Heated narrow-band design. Provides the diagnostic feedback the ECU requires.
Threaded mounting. Uses an M18 x 1.5 thread for a secure install.
Walker OE Replacement Oxygen Sensor for Ford
Walker OE Replacement part number 350-34678 is a heated narrow-band oxygen sensor built for specific vehicle applications and downstream placement. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on select Ford Bronco Sport and Ford Escape models.
Key Features
- Heated narrow-band oxygen sensor for downstream monitoring
- Specific-fit design for the listed Ford applications
- 4-wire configuration with female connector and female terminals
- Threaded mounting with M18 x 1.5 thread size
- Oblong connector shape with 22 mm wrench size
- Walker OE Replacement part number 350-34678
Product Details
Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement components for specific vehicle applications. This sensor is designed to match the required fitment position and diagnostic feedback expected by the ECU on the listed Ford Bronco Sport and Ford Escape models. The heated narrow-band design supports stable sensor operation once the exhaust system reaches operating temperature, while the threaded mounting and application-specific harness layout help maintain correct installation geometry.
Walker OE Replacement 350-34678 is a direct-fit oxygen sensor for emissions control service where the original downstream sensor has failed or is reporting incorrect data. This part number is used for 2021-2022 Ford Bronco Sport, downstream, and 2020-2022 Ford Escape, downstream. If you are searching for a downstream oxygen sensor for a 2021 Ford Bronco Sport or a 2022 Ford Escape, 350-34678 is the OE-style replacement to review.
What It Helps Address
- Check engine light related to downstream oxygen sensor faults
- Incorrect air-fuel feedback reaching the ECU
- Rough engine operation caused by inaccurate sensor data
- Increased fuel consumption from poor emissions-system input
- Elevated exhaust emissions from a failing sensor
Installation Notes and Tips
Confirm the downstream sensor location before installation and verify connector shape, wire count, thread size, and harness length against the original part. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life and affect readings. For best results, clear stored fault codes after installation and verify that the ECU completes its readiness checks.
Quality Assurance
Walker Products has supplied engine management and fuel system components since 1946 and manufactures this sensor as an OE replacement for the specified application. The company operates under ISO 9001/TS 16949 quality systems for electronic sensor production.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2022 | Ford | Bronco Sport | 1.5L | L3 | Downstream | OE Replacement |
| 2022 | Ford | Escape | 1.5L | L3 | Downstream | OE Replacement |
| 2021 | Ford | Bronco Sport | 1.5L | L3 | Downstream | OE Replacement |
| 2021 | Ford | Escape | 1.5L | L3 | Downstream | OE Replacement |
| 2020 | Ford | Escape | 1.5L | L3 | Downstream | OE Replacement |
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