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Walker 350-34308 Oxygen Sensor - Downstream
| Brand | Walker 350-34308 |
|---|---|
| Position | Downstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 37.52 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 33.98 |
| Product line | Walker Products Aftermarket |
| Fits | Lexus · 5 vehicles |
OE replacement. Engineered as a direct-fit oxygen sensor for the specified application.
Heated sensor. Delivers the diagnostic feedback the ECU expects.
Threaded mount. Installs with a secure, threaded connection.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker 350-34308 Oxygen Sensor for Lexus IS300
Walker Products 350-34308 is a heated oxygen sensor built as a specific-fit OE replacement for the downstream position on select Lexus IS300 models. It is engineered to deliver the ECU feedback needed for proper fuel control and emissions monitoring on 2001-2005 Lexus IS300 applications.
Key Features
- Heated oxygen sensor for downstream placement
- Specific fit for the application and mounting position
- 4-wire design with 20-gauge wiring
- 33.98 in. wiring harness length and 37.52 in. overall length
- 18.0 mm threaded mounting type
- Male connector with radiused polygon shape
Application Details
Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE-style replacements. Part number 350-34308 is made for the downstream oxygen sensor location on 2001-2005 Lexus IS300 models, including the downstream sensor compatible with cylinders 4-6. If you are searching for a Lexus IS300 downstream oxygen sensor, Walker 350-34308 provides the correct fitment profile for this vehicle family.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Address
- Check engine light related to oxygen sensor performance
- Poor fuel economy caused by inaccurate exhaust feedback
- Elevated exhaust emissions from a failing sensor
- Rough engine operation tied to incorrect ECU input
- Stored fault codes in the ECU for the affected sensor circuit
Installation Notes
Verify the downstream location, connector style, thread diameter, and harness routing before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life and affect signal quality. Confirm the vehicle application against the part number 350-34308 before replacement.
Quality Assurance
Walker Products has produced engine management components since 1946 and manufactures this sensor as a specific application replacement for the listed Lexus IS300 fitment. The company is ISO 9001 and TS 16949 certified, with manufacturing and catalog support built around aftermarket service requirements.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2005 | Lexus | IS300 | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor compatible with cylinders 4-6.; Walker Products Aftermarket |
| 2004 | Lexus | IS300 | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor compatible with cylinders 4-6.; Walker Products Aftermarket |
| 2003 | Lexus | IS300 | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor compatible with cylinders 4-6.; Walker Products Aftermarket |
| 2002 | Lexus | IS300 | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor compatible with cylinders 4-6.; Walker Products Aftermarket |
| 2001 | Lexus | IS300 | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor compatible with cylinders 4-6.; Walker Products Aftermarket |
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