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Walker 250-25181 Oxygen Sensor - Upstream Left or Upstream Right
| Brand | Walker 250-25181 |
|---|---|
| Position | Upstream Right and Upstream Left |
| 11589 | Metric |
| Heated | Yes |
| Wiring Harness Length | 530 |
| Wire Gauge Measurement | 20 |
| Sensor Type | Wide-band |
| Terminal Type | Blade |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 5 |
| Grade Type | Standard replacement |
| Connector Shape | D-shape |
| Terminal Quantity | 6 |
| Connector Gender | Female |
| Terminal Gender | Male |
| Wrench Size | 7/8" - 9 |
| Thread Size | M18 - 1.5 |
| Overall Length | 555 |
| Mounting Type | Threaded |
| Product line | OE Base Sensor |
| Fits | Cadillac, Ford, and Lincoln · 3 vehicles |
Specific-fit design. Built for application-matched replacement without universal adaptation.
Heated wide-band sensor. Provides precise exhaust feedback for standard replacement service.
Threaded metric mount. Uses an M18 x 1.5 thread with a D-shape female connector.
Overview
Walker OE Base Sensor 250-25181 is a specific-fit oxygen sensor built as a standard replacement for select applications. It uses a heated wide-band design with a threaded M18 x 1.5 mount, a D-shape female connector, and a 5-wire layout for direct sensor replacement.
Compatible With 2024 Ford Expedition, upstream left; 2024 Lincoln Navigator, upstream left; and 2020 Cadillac CT6, upstream right. This part number, 250-25181, is a fitment-specific option for vehicles that require the OE Base Sensor configuration.
Key Features
- Heated wide-band oxygen sensor for precise exhaust feedback.
- Specific-fit design for direct application matching.
- Threaded M18 x 1.5 mounting with 7/8" wrench size.
- Female D-shape connector with blade terminals.
- Standard replacement grade for OE-style service work.
Detailed Description
The Walker OE Base Sensor line focuses on application-specific oxygen sensors that match the required connector, thread, and wiring configuration. Part number 250-25181 uses a 6-terminal, 5-wire setup with a 530 mm harness length, 20-gauge wiring, and a heated wide-band sensing element. Its threaded mounting style and metric thread size support a direct replacement approach where the original sensor specification must be maintained.
For buyers searching for a Ford Expedition oxygen sensor, Lincoln Navigator oxygen sensor, or Cadillac CT6 oxygen sensor, this OE Base Sensor part number 250-25181 provides a fitment-matched solution. It is also relevant for service work where the upstream sensor location and connector style must align with the original equipment layout.
What It Helps Address
- Fault codes related to oxygen sensor performance.
- Rough idle or drivability issues tied to exhaust feedback.
- Incorrect air-fuel ratio readings from a worn sensor.
- Connector or wiring mismatch during sensor replacement.
- Threaded sensor replacement needs on specific-fit applications.
Installation Notes and Tips
Verify the upstream left or upstream right application before ordering, since fitment varies by vehicle and engine configuration. Confirm the connector shape, terminal count, thread size, and harness length against the original sensor before installation. Use the correct 7/8" wrench size and ensure the threaded mount is clean before fitting the replacement sensor.
Quality Assurance
Walker OE Base Sensor parts are built as standard replacement components for application-specific service. Part number 250-25181 is listed with specific fitment data for the 2024 Ford Expedition, 2024 Lincoln Navigator, and 2020 Cadillac CT6.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2024 | Ford | Expedition | 3.5L | V6 | Upstream Left | OE Base Sensor |
| 2024 | Lincoln | Navigator | 3.5L | V6 | Upstream Left | OE Base Sensor |
| 2020 | Cadillac | CT6 | 4.2L | V8 | Upstream Right | OE Base Sensor |
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