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Walker 250-21065 Oxygen Sensor - Downstream
| Brand | Walker 250-21065 |
|---|---|
| Position | Downstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Flange Mount |
| Overall Length | 14.88 |
| Sensor Type | Non Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 1 |
| Wiring Harness Length | 11.34 |
| Product line | Walker Products OE |
| Fits | Lexus · 4 vehicles |
OE replacement. Engineered as an original-equipment-style sensor for the specific application.
Non-heated sensor. Provides the diagnostic feedback the ECU requires.
Flange mount. Installs with a secure, application-specific fit.
OE Oxygen Sensor for Lexus GS300
Walker Products OE 250-21065 is a specific-fit oxygen sensor engineered for downstream monitoring on select 1993-1994 Lexus GS300 models. It is built to provide the ECU with the diagnostic feedback needed for accurate emissions and fuel-control operation.
Key Features
- Specific-fit oxygen sensor for downstream placement
- Non-heated sensor design
- 18.0 mm thread diameter
- Radiused polygon male connector
- 11.34 in. wiring harness length with 20-gauge wire
- Flange mount design
- Overall length: 14.88 in.
Product Details
Walker Products OE 250-21065 is an OE-style replacement oxygen sensor for the downstream position on 1993-1994 Lexus GS300 applications, including non-California emissions vehicles. Walker Products OE focuses on application-specific engine management sensors, and this part is matched to the required fitment position so the ECU receives the correct signal for emissions system monitoring. If your Lexus GS300 has a stored fault code, poor fuel economy, elevated exhaust emissions, or an illuminated malfunction indicator light, the sensor circuit should be inspected along with the wiring harness and connector.
Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures to automotive ISO 9001/TS 16949 standards. Part number 250-21065 is built for the listed application and position, making it a direct replacement choice for Lexus GS300 downstream oxygen sensor service.
Common Issues This Sensor May Address
- Check engine light related to downstream oxygen sensor performance
- Poor fuel economy caused by inaccurate exhaust feedback
- Higher exhaust emissions from a failing sensor
- Rough engine operation tied to incorrect ECU input
- Stored diagnostic trouble codes in the emissions system
Installation Notes and Tips
Verify the downstream location before replacement and inspect the sensor wiring, connector, and harness for heat damage or corrosion. Confirm thread size and connector style match the original unit on your Lexus GS300. This sensor uses a specific-fit design, so correct placement and emissions configuration are important for proper operation.
Quality Assurance
Walker Products OE 250-21065 is manufactured as an OE replacement sensor for the listed application and produced under automotive ISO 9001/TS 16949 quality systems.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1994 | Lexus | GS300 | 3.0L | L6 | GAS | Downstream | Downstream placement for vehicles without California emissions certification.; Walker Products OE |
| 1994 | Lexus | GS300 | 3.0L | L6 | GAS | Downstream | Downstream Oxygen Sensor compatible with Non-California ESV vehicles.; Walker Products OE |
| 1993 | Lexus | GS300 | 3.0L | L6 | GAS | Downstream | Downstream placement for vehicles without California emissions certification.; Walker Products OE |
| 1993 | Lexus | GS300 | 3.0L | L6 | GAS | Downstream | Downstream Oxygen Sensor compatible with Non-California ESV vehicles.; Walker Products OE |
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