Walker 350-35002 Oxygen Sensor - Upstream or Upstream Rear

Walker 350-35002 Oxygen Sensor for BMW

Walker Products 350-35002 is a heated oxygen sensor built for specific BMW applications, including upstream and upstream rear positions. It is engineered as an OE-style replacement for vehicles that rely on accurate exhaust feedback to manage fuel delivery, emissions, and drivability.

For BMW Z4, 335i, 535i, X6, and related turbocharged applications, this sensor helps restore the ECU signal needed for proper air-fuel control. The Walker Products Aftermarket line focuses on application-specific fitment, so the connector, harness length, and threaded mounting style match the intended vehicle position.

Key Features

• Part number: 350-35002
• Heated oxygen sensor for precise exhaust monitoring
• Specific-fit design for BMW upstream and upstream rear locations
• 5-wire configuration with male radiused polygon connector
• 44.8 in. wiring harness length and 48.35 in. overall length
• 18.0 mm thread diameter with threaded mounting type
• Walker Products Aftermarket OE-style replacement line

Product Details

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as direct replacement parts for defined vehicle applications. This 350-35002 oxygen sensor is built for BMW models that use Bank 2 Sensor 1 or related upstream positions, including 2007-2010 BMW 335i, 2008-2010 BMW 535i, 2008-2010 BMW X6, and 2009-2014 BMW Z4. It also covers select BMW 335is, 1 Series M, 135i, 335xi, 535xi, and 535i xDrive applications. Accurate exhaust feedback supports ECU fuel-trim control and emissions monitoring.

This part cross-references common OE-style oxygen sensor applications for the same BMW fitments.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine running caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel correction
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to Bank 2 Sensor 1 or upstream sensor circuits

Installation Notes and Tips

Confirm the exact position before ordering, since this part is listed for upstream and upstream rear BMW applications. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Verify thread size and connector style against the original sensor to ensure proper fitment on the BMW Z4, 335i, 535i, or X6 application.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company with a long history in engine management and fuel system components. The 350-35002 is manufactured for specific application fitment and ECU feedback requirements.