Walker 350-34104 Oxygen Sensor - Downstream

Walker 350-34104 Oxygen Sensor for Saab 9-3

Walker 350-34104 is a heated oxygen sensor built as a specific-fit replacement for the downstream bank 1 sensor 2 location on select 2003 Saab 9-3 models. It is engineered to deliver the ECU feedback needed for accurate fuel control and emissions monitoring.

Key Features

• Specific-fit oxygen sensor for the downstream position
• Heated sensor design for faster operating response
• 4-wire configuration with 20-gauge wiring
• 26.1 in. wiring harness length and 29.65 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Radiused polygon male connector for application-specific connection

Product Details

Walker Products Aftermarket 350-34104 is part of the Walker Products Engine Management line, focused on OE-style replacement sensors for vehicle-specific applications. This oxygen sensor is built for the downstream bank 1 sensor 2 location on 2003 Saab 9-3 models, where it helps the engine control module monitor exhaust oxygen content and adjust system operation accordingly. The heated design supports quicker sensor activity after startup, while the specific-fit construction helps match the original mounting position and connector style. Walker 350-34104 is a direct replacement choice for drivers servicing a 2003 Saab 9-3, downstream oxygen sensor circuit.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to incorrect air-fuel data
• Stored ECU fault codes for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle is a 2003 Saab 9-3 and verify the downstream bank 1 sensor 2 location 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. Match the threaded mounting and connector shape to the original part before final fitment. This part cross-references no listed part numbers for the same application.

Quality Assurance

Walker Products has manufactured engine management and oxygen/air-fuel sensors as OE-replacement components for many vehicle applications worldwide. The brand’s ISO 9001/TS 16949 certified manufacturing background supports consistent application-specific fitment and diagnostic feedback for the ECU.