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Walker 350-35018 Oxygen Sensor - Upstream
| Brand | Walker 350-35018 |
|---|---|
| Position | Upstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 53.27 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 5 |
| Wiring Harness Length | 49.72 |
| Product line | Walker Products Aftermarket |
| Fits | Audi · 2 vehicles |
OE replacement. Engineered as a direct-fit oxygen sensor for reliable ECU feedback.
Heated sensor. Helps maintain accurate readings as the exhaust system warms up.
Threaded mounting. Installs with a secure, screw-in connection.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker 350-35018 Oxygen Sensor for Audi S8
Walker Products 350-35018 is a heated oxygen sensor built as a direct-fit replacement for specific applications. It is engineered for the 2007 Audi S8 upstream position and is designed to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring.
Key Features
- Heated oxygen sensor for faster operating response
- Specific-fit design for the upstream location
- 5-wire configuration with male connector
- Threaded mounting with 18.0 mm thread diameter
- Wiring harness length: 49.72 in.; overall length: 53.27 in.
- Radiused polygon connector shape for application-specific fitment
Product Details
The Walker Products Aftermarket line focuses on OE-style engine management and oxygen sensor replacements for exact vehicle applications. Part number 350-35018 is manufactured for the specified fitment position and wiring configuration, helping maintain the diagnostic feedback the engine control unit expects from the upstream sensor. For drivers searching for a 2007 Audi S8 upstream oxygen sensor replacement, this part is matched to the listed application and connector layout.
This part cross-references no listed aftermarket part numbers for the same application.
Common Issues This Sensor May Address
- Check engine light related to oxygen sensor performance
- Rough engine operation caused by incorrect air-fuel feedback
- Increased fuel consumption from inaccurate sensor readings
- Higher exhaust emissions from poor mixture control
- Fault codes stored in the ECU for the affected sensor circuit
Installation Notes
Verify the upstream position, connector style, wire count, and thread diameter before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life. Confirm the vehicle application against the listed fitment for the 2007 Audi S8 before replacing the sensor.
Quality Assurance
Walker Products manufactures engine management sensors as OE-replacement parts for specific applications and builds them under Automotive ISO9001/TS 16949 quality systems. Since 1946, the brand has supplied oxygen and air-fuel sensors for vehicle-specific fitment and ECU feedback requirements.
| Year | Make | Model | Submodel | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2007 | Audi | S8 | Base | 5.2L | V10 | GAS | Upstream | Cyl 9,10; Cil 9,10; Upstream; Walker Products Aftermarket |
| 2007 | Audi | S8 | Base | 5.2L | V10 | GAS | Upstream | Cyl 9,10; Upstream; Walker Products Aftermarket |
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