Walker 350-34146 Oxygen Sensor - Downstream

Walker 350-34146 Oxygen Sensor for Chevrolet Astra

Walker Products 350-34146 is an OE-style oxygen sensor built for specific downstream applications on the Chevrolet Astra. It is engineered to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring.

Key Features

• Direct-fit oxygen sensor for downstream bank 1 sensor 2 applications
• OE replacement design for specific vehicle fitment and sensor position
• Supports ECU feedback for emissions and engine management systems
• Walker Products Aftermarket line for engine management and oxygen/air-fuel sensors
• Part number 350-34146 for application-specific lookup

Detailed Description

Walker Products 350-34146 is part of the Walker Products Aftermarket engine management sensor line, developed as an OE replacement for selected vehicles worldwide. This oxygen sensor is specified for downstream placement and is listed for 2004 Chevrolet Astra and 2005-2008 Chevrolet Astra, downstream bank 1 sensor 2 on specific vehicle models. The sensor is designed to deliver the feedback the ECU uses to monitor exhaust and fuel-system performance. If the original sensor is failing, the vehicle may run poorly, use more fuel, increase emissions, or trigger the malfunction indicator light. The part number 350-34146 is intended for exact application matching, making it a practical choice when servicing a Chevrolet Astra oxygen sensor location.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation tied to sensor signal issues
• Elevated exhaust emissions from a worn sensor
• Stored ECU fault codes linked to the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle year, make, model, and sensor position before ordering. This part is listed for downstream bank 1 sensor 2 use on specific Chevrolet Astra models, so match the connector, wiring harness, and mounting location to the original unit. Inspect the sensor wiring and connector for physical damage before installation, since damaged components can shorten service life and affect signal quality.

Quality Assurance

Walker Products has been manufacturing engine management and fuel-system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The Walker Products Aftermarket line is built around application-specific replacement parts for modern diagnostic systems, including oxygen and air-fuel sensors.