Walker 250-25195 Oxygen Sensor - Upstream Left

OE Base Oxygen Sensor for Porsche Cayenne

Walker OE Base Sensor 250-25195 is a specific-fit wide-band oxygen sensor for select Porsche Cayenne applications. It is built for the upstream left position and is engineered to deliver the diagnostic feedback the ECU expects from the original sensor location.

For 2019-2020 Porsche Cayenne models, this Walker oxygen sensor supports accurate air-fuel monitoring and helps maintain proper engine management performance when the original sensor is worn or failing.

Key Features

• Walker OE Base Sensor line for OE-style replacement fitment
• Wide-band oxygen sensor design
• Heated sensor for faster operating temperature
• Specific fit for the upstream left position
• 5-wire, 6-terminal configuration
• Female connector with circular connector shape
• M18 x 1.5 thread size and 22 mm wrench size

Detailed Description

Walker Products 250-25195 is an emission control oxygen sensor designed for exact application fitment on select Porsche Cayenne vehicles. As part of the OE Base Sensor line, it is built around the original sensor location and signal requirements so the ECU receives the feedback needed for fuel control and emissions monitoring. The wide-band design and heated construction support responsive sensor operation in modern engine management systems.

Walker Products has focused on engine management and oxygen/air-fuel sensors since 1946, with manufacturing aligned to ISO 9001/TS 16949 quality systems. This part number is intended for the upstream left position on 2019-2020 Porsche Cayenne models, making it a direct-match option when replacing the original sensor.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate air-fuel feedback
• Rough engine operation from a failing upstream sensor
• Elevated exhaust emissions from incorrect mixture control
• Fault codes stored in the ECU tied to the affected sensor circuit

Installation Notes and Tips

Fits 2019 Porsche Cayenne, upstream left. Fits 2020 Porsche Cayenne, upstream left. Confirm the connector shape, wire count, thread size, and sensor position before installation. Inspect the sensor wiring harness and connector for damage, since physical wear can shorten sensor life and affect diagnostic readings. Verify the original sensor location and note the vehicle build date reference listed for each application.

Quality Assurance

Walker Products manufactures engine management sensors for OE-style replacement applications and operates under ISO 9001/TS 16949 quality standards. Part number 250-25195 is built for the specified Porsche Cayenne fitment and sensor position.