Walker 350-33027 Oxygen Sensor - Upstream or Upstream Front

Walker 350-33027 Oxygen Sensor for OE-Style Engine Management

Walker Products 350-33027 is a heated oxygen sensor built for specific vehicle applications and ECU feedback requirements. It is engineered as an OE-style replacement for select 1996-1997 Ford Probe, Mazda 626, and Mazda MX-6 models with upstream front sensor placement.

Key Features

• Heated oxygen sensor for faster operating temperature and signal response
• Specific-fit design for direct application matching
• Threaded mounting type with 18.0 mm thread diameter
• 3-wire configuration with 20-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Overall length: 12.52 in.; wiring harness length: 8.98 in.

Product Details

This Walker Products Aftermarket oxygen sensor is part of the Walker Products Engine Management line, which focuses on replacement sensors and fuel system components for vehicle-specific service needs. Part number 350-33027 is intended for upstream front locations and is listed for 1996-1997 Ford Probe, 1996-1997 Mazda 626, and 1996-1997 Mazda MX-6 applications. In these vehicles, the upstream oxygen sensor provides feedback used by the ECU to help manage air-fuel control and emissions performance.

Walker 350-33027 is a threaded, heated sensor with a male radiused polygon connector and a 3-wire layout. The fitment data identifies this part for upstream front and upstream positions, including Bank 1 Sensor 1 applications where specified. If the original sensor has failed, the vehicle may store fault codes and show drivability or emissions-related symptoms.

What It May Help Resolve

• Check engine light or MIL illumination related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough running or inconsistent engine operation
• Elevated exhaust emissions
• Stored ECU fault codes tied to upstream sensor circuits

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is listed for upstream front and upstream locations only. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation. Because the sensor is threaded, verify thread diameter and connector style against the original part on the vehicle. For fitment-based searches, this is a direct replacement oxygen sensor for 1996-1997 Ford Probe upstream front, 1996-1997 Mazda 626 upstream, and 1996-1997 Mazda MX-6 upstream applications.

Quality Assurance

Walker Products manufactures engine management sensors to application-specific standards and operates as an ISO 9001/TS 16949 certified company. Part number 350-33027 is built for the listed vehicle fitments and ECU feedback requirements. This part cross-references standard OE-style replacement needs for the same application.