Walker 350-33053 Oxygen Sensor - Upstream

Walker 350-33053 Oxygen Sensor Overview

Walker Products 350-33053 is a heated oxygen sensor built as a specific-fit OE replacement for select Volkswagen applications. It is engineered for upstream placement and provides the ECU with the exhaust feedback needed for accurate fuel control and emissions monitoring.

For Volkswagen EuroVan, Cabriolet, Fox, Corrado, Golf, and Jetta applications, this upstream oxygen sensor is matched to the vehicle’s fitment position and connector requirements. The Walker Products Aftermarket line focuses on application-specific engine management sensors for direct replacement use.

Key Features

• Part number: 350-33053
• Heated oxygen sensor for faster operating response
• Specific fit for confirmed Volkswagen applications
• Upstream mounting position
• Threaded mounting type with 18.0 mm thread diameter
• 3-wire design with 20-gauge wiring
• Male connector with radiused polygon shape
• Wiring harness length: 21.38 in.
• Overall length: 24.92 in.

Detailed Description

Walker Products 350-33053 is an upstream heated oxygen sensor designed for select 1990-1996 Volkswagen models, including EuroVan, Cabriolet, Fox, Corrado, Golf, and Jetta. It is built to deliver the diagnostic feedback the ECU uses to manage air-fuel ratio, helping maintain proper engine operation and emissions control. This part number is a direct-fit replacement for the specified applications and positions, including California emissions ESV listings where noted.

Walker Products Aftermarket engine management sensors are developed as OE-style replacements for worldwide vehicle coverage. The brand line is focused on application-specific fitment, so the sensor, connector, and harness layout are matched to the vehicle configuration rather than treated as a universal part. This makes 350-33053 a practical choice when replacing a failed upstream oxygen sensor on Volkswagen EuroVan, Volkswagen Cabriolet, or Volkswagen Jetta applications.

What This Sensor Helps Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Rough running or inconsistent air-fuel control
• Higher exhaust emissions from a degraded upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

• Confirm upstream position before installation; this part is not listed for downstream use.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement.
• Verify the 18.0 mm threaded mounting point and connector style match the vehicle.
• Use the vehicle’s service information to confirm the correct Volkswagen EuroVan, Cabriolet, Fox, Corrado, Golf, or Jetta application.
• Clear diagnostic trouble codes after installation and verify closed-loop operation.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an ISO 9001/TS 16949 certified company. Part number 350-33053 is manufactured for the specified application and fitment position to support proper ECU feedback in confirmed Volkswagen applications.