OE Quality
60-Day Returns

Walker 350-34854 Oxygen Sensor - Downstream
Reliable Oxygen Sensor for Volkswagen Polo
The Walker 350-34854 oxygen sensor is designed specifically for Volkswagen Polo models, ensuring accurate emission control and optimal engine performance. This sensor plays a critical role in monitoring exhaust gases to maintain efficient fuel combustion.
- Compatible with Volkswagen Polo vehicles
- Part number 350-34854 for precise identification
- Category: Emission Control > Sensors
- Type: Oxygen Sensor
- Manufactured by Walker under the Walker Products Aftermarket line
About the Walker Products Aftermarket Line
The Walker Products Aftermarket line offers a range of emission control components designed to meet or exceed OEM specifications. This product line focuses on providing reliable replacement parts that support vehicle emissions systems, including oxygen sensors like the 350-34854, which are engineered for durability and accurate sensor readings.
Product Details and Functionality
The Walker 350-34854 oxygen sensor is engineered to detect oxygen levels in the exhaust stream of Volkswagen Polo vehicles. By providing real-time data to the engine control unit (ECU), it helps regulate the air-fuel mixture for efficient combustion and reduced emissions. This sensor is essential for maintaining compliance with emission standards and ensuring smooth engine operation.
Common Issues Addressed by This Oxygen Sensor
- Incorrect air-fuel mixture causing poor fuel economy
- Check engine light triggered by faulty sensor readings
- Increased exhaust emissions leading to failed emissions tests
- Engine performance problems such as rough idling or hesitation
- Potential damage to catalytic converter from improper combustion
Installation Notes and Tips
When installing the Walker 350-34854 oxygen sensor on a Volkswagen Polo, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor carefully to prevent damage to the exhaust manifold or wiring. Verify the sensor connector matches the vehicle harness and follow torque specifications recommended by the manufacturer for secure installation.
Quality Assurance and Warranty
Walker oxygen sensors, including part number 350-34854, are manufactured to meet industry standards for emission control components. The Walker Products Aftermarket line is known for consistent quality and reliability. Please refer to Walker's official documentation for specific warranty details applicable to this oxygen sensor.
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2017 | Volkswagen | Polo | 1.2L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket |
| 2016 | Volkswagen | Polo | 1.2L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket |
| 2014 | Volkswagen | Polo | 1.2L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket |
| 2013 | Volkswagen | Polo | 1.4L | L4 | GAS | Downstream | B1S3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2013 | Volkswagen | Polo | 1.2L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket |
| 2013 | Volkswagen | Polo | 1.4L | L4 | GAS | Downstream | Downstream Oxygen Sensor compatible with Bank 1 Sensor 3.; Walker Products Aftermarket |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.