Walker 350-34248 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34248 Oxygen Sensor Overview

Walker Products 350-34248 is a specific-fit heated oxygen sensor built for OE-style replacement in select applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, including fitments for Porsche Cayenne downstream left and downstream right positions.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for direct application matching, with this part number built around the required mounting position, connector style, and harness length for the listed vehicles.

Key Features

• Heated oxygen sensor for emissions and fuel-trim feedback
• Specific fit design for the listed vehicle applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 22-gauge wiring
• 29.06 in. wiring harness length and 32.6 in. overall length
• Female connector with radiused polygon shape
• Fits 2011-2018 Porsche Cayenne, downstream right
• Fits 2011-2018 Porsche Cayenne, downstream left
• Fits 2001-2003 Chevrolet Astra, upstream

Detailed Description

Walker Products 350-34248 oxygen sensor is designed as an OE replacement for vehicles that require a heated, threaded sensor with the correct connector and harness layout. In the Porsche Cayenne, this part is listed for both downstream left and downstream right positions across 2011-2018 model years, making it a direct-match option for exhaust system feedback on those applications. It is also listed for 2001-2003 Chevrolet Astra upstream service.

This part cross-references Bosch 15717 and Denso 234-9005 for the same application.

What It Helps Address

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

Installation Notes and Tips

Confirm the sensor position before ordering: downstream left, downstream right, or upstream. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten service life and affect ECU feedback. Verify thread diameter, connector shape, and harness length against the original sensor to ensure proper routing and fitment.

Quality Assurance

Walker Products manufactures this sensor as part of its engine management and oxygen/air-fuel sensor line, with application-specific fitment and ECU feedback requirements in mind. The brand states its operations are supported by ISO 9001/TS 16949 certification and long-standing aftermarket experience.