Walker 350-34572 Oxygen Sensor - Downstream

Walker 350-34572 Oxygen Sensor Overview

Walker Products 350-34572 is a heated oxygen sensor built as a specific-fit OE replacement for select 2007 Pontiac Solstice and 2007 Saturn Sky applications. It is designed for downstream use and provides the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

For drivers diagnosing a check engine light, poor fuel economy, or elevated exhaust emissions, this Walker Products Aftermarket oxygen sensor is built around the exact application and connector style required for the vehicle.

Key Features

• Heated oxygen sensor for downstream placement
• Specific-fit design for direct application matching
• 4-wire configuration with 20-gauge wiring
• 13.31 in. wiring harness length and 16.85 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Radiused polygon male connector for proper vehicle-side connection
• Walker Products 350-34572 engineered for OE-style replacement use

Detailed Description

Walker Products 350-34572 is part of the Walker Products Aftermarket engine management and oxygen/air-fuel sensor line, developed to replace original equipment sensors across a wide range of vehicles. This heated downstream oxygen sensor is built for the 2007 Pontiac Solstice and 2007 Saturn Sky, including B1S2 downstream applications noted in the fitment data. The sensor is manufactured for the specified position so the ECU receives the correct diagnostic feedback for emissions and fuel management.

Walker Products has supplied engine management and fuel system components since 1946 and manufactures sensors to application-specific requirements. If the original sensor has failed or the wiring and connector are damaged, the vehicle may run poorly, use more fuel, or trigger a malfunction indicator light. Walker Products 350-34572 is a direct-fit replacement for those exact downstream applications.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Increased exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle is a 2007 Pontiac Solstice or 2007 Saturn Sky with the listed downstream application before ordering. Match the connector shape, wire count, thread diameter, and sensor position to the original part. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect operation.

Fits 2007 Pontiac Solstice, downstream. Fits 2007 Saturn Sky, downstream. Fits 2007 Saturn Sky, downstream B1S2 first design with 16 in. lead.

Quality Assurance

Walker Products manufactures engine management sensors as OE-style replacements and operates as an Automotive ISO9001/TS 16949 certified company. The Walker Products Aftermarket line is built around application-specific fitment and ECU feedback requirements for modern emissions systems.