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Walker 350-34288 Oxygen Sensor - Upstream
| Brand | Walker 350-34288 |
|---|---|
| Position | Upstream |
| Connector Gender | Female |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 33.58 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 30.04 |
| Product line | Walker Products Aftermarket |
| Fits | BMW · 2 vehicles |
OE replacement. Engineered as a direct-fit oxygen sensor for the specified application.
Heated sensor. Delivers fast feedback to the engine management system.
Threaded mount. Installs with a secure, threaded connection.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker 350-34288 Oxygen Sensor for BMW 318is
Walker Products 350-34288 is a heated oxygen sensor built as a specific-fit OE-style replacement for select applications. It is engineered for upstream placement and is listed for the 1991 BMW 318is, including Bank 1 Sensor 1 service needs.
Key Features
- Heated oxygen sensor design for faster operating response
- Specific fitment for the correct application and mounting position
- 4-wire configuration with a female connector
- Threaded mounting type with 18.0 mm thread diameter
- 30.04 in. wiring harness length and 33.58 in. overall length
- Radiused polygon connector shape for vehicle-specific connection
Product Details
Walker Products Aftermarket 350-34288 is part of the Walker Products Engine Management and Oxygen/Air-Fuel sensor line, developed as an OE replacement for many vehicles worldwide. For the 1991 BMW 318is upstream oxygen sensor location, this part is intended to provide the ECU with the feedback needed for fuel control and emissions management. Walker Products has focused on engine management sensors and fuel system components since 1946, with ISO 9001/TS 16949 certified manufacturing processes supporting consistent application-specific production.
This part cross-references common OE-style oxygen sensor applications for the same vehicle position.
What It Helps Address
- Check engine light or MIL illumination tied to oxygen sensor faults
- Poor engine performance caused by incorrect air-fuel feedback
- Increased fuel consumption from a failing upstream sensor
- Higher exhaust emissions from inaccurate sensor readings
- Stored ECU fault codes related to the oxygen sensor circuit
Installation Notes
Fits 1991 BMW 318is, upstream. Confirm the sensor location before installation and inspect the wiring harness and connector for damage, since physical wear can shorten sensor life. Verify the threaded mounting point, connector style, and harness routing match the original sensor before replacement.
Quality Assurance
Walker Products manufactures this oxygen sensor as a specific application replacement with OE-style fitment and ECU feedback requirements in mind. The brand’s ISO 9001/TS 16949 certified manufacturing background supports controlled production for engine management components.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1991 | BMW | 318is | 1.8L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1991 | BMW | 318is | 1.8L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
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