Walker 350-35030 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Walker 350-35030 Oxygen Sensor Overview

The Walker Products 350-35030 is a heated oxygen sensor built as a specific-fit OE replacement for select Mercedes-Benz, BMW, and Mini applications. It is engineered to deliver the ECU feedback needed for accurate fuel control, emissions monitoring, and fault-code diagnosis.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. The 350-35030 follows that approach with a threaded mounting design, 5-wire configuration, and a radiused polygon male connector for direct replacement service.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific-fit design for confirmed vehicle applications
• 5-wire construction with 20-gauge wiring
• 25.12 in. wiring harness length and 28.66 in. overall length
• 18.0 mm thread diameter with threaded mounting type
• Radiused polygon connector shape with male terminal
• OE replacement positioning for select Mercedes-Benz, BMW, and Mini models

Detailed Description

Walker Products part number 350-35030 is designed for upstream oxygen sensor locations where the engine control unit relies on precise exhaust-gas feedback. It is listed for a broad range of applications including Mercedes-Benz GLC300, C300, E300, SL550, SL450, SLC300, and GLC350e; BMW 550i, 650i, M5, M6, 750i, 750Li, 760Li, X5, and Mini Cooper. For shoppers searching for an upstream oxygen sensor for Mercedes-Benz GLC300 or a BMW upstream O2 sensor replacement, this part provides a direct-fit option for the confirmed positions shown in the fitment data.

As an OE-style replacement, the 350-35030 is intended to restore proper sensor feedback after a failed unit, damaged wiring, or connector issues. This part cross-references Bosch 17098 and Denso 234-9005 for the same application.

What It Helps Address

• Check engine light or malfunction indicator light related to oxygen sensor faults
• Poor engine performance caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Higher exhaust emissions from a degraded upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Verify the exact year, make, model, and sensor position before ordering. This part is listed for upstream, upstream left, and upstream right locations depending on the vehicle application. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since physical damage can shorten sensor life. Confirm thread size and connector style match the original unit on your Mercedes-Benz, BMW, or Mini vehicle.

Quality Assurance

Walker Products has supplied engine management components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The 350-35030 is manufactured for specific application fitment and ECU feedback requirements.