Walker 350-34037 Oxygen Sensor - Downstream or Upstream

Walker 350-34037 Oxygen Sensor for Kia

Walker Products 350-34037 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Kia applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring on covered upstream and downstream positions.

Key Features

• Heated oxygen sensor with 4-wire design
• Specific fit for the listed Kia applications
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for proper vehicle-side connection
• 13.31 in. wiring harness length and 16.85 in. overall length
• 20-gauge wiring for the application-specific harness design

Product Details

Walker Products Aftermarket focuses on engine management and oxygen sensor replacement parts engineered for direct application fitment. Part number 350-34037 is made for select Kia Spectra, Sportage, and Sephia models, including upstream and downstream positions where listed. For Kia Spectra and Kia Sportage oxygen sensor replacement, this part number is a direct-match option for the specified bank and sensor locations.

This oxygen sensor is designed to help the engine control unit monitor exhaust oxygen content so the system can adjust air-fuel delivery and track emissions performance. Walker Products 350-34037 is a practical choice when replacing a worn sensor on a 2002 Kia Spectra upstream oxygen sensor application, a 1996-2002 Kia Sportage upstream or downstream oxygen sensor location, or a 1998-2001 Kia Sephia upstream position.

This part cross-references common OE-style replacement applications for the same vehicle coverage.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running caused by inaccurate exhaust feedback
• Higher fuel consumption from incorrect air-fuel correction
• Elevated exhaust emissions from a degraded sensor
• Fault codes stored in the ECU for sensor circuit or response issues

Installation Notes

Confirm the sensor position before installation: upstream or downstream, and verify the bank and sensor number against the vehicle service information. Inspect the wiring harness and connector for heat damage, abrasion, or corrosion before replacement. Because this is a threaded sensor, proper removal and installation tools should be used to avoid damaging the exhaust bung or sensor threads.

Quality Assurance

Walker Products manufactures engine management and oxygen sensor components as OE-replacement parts for worldwide vehicle applications. The company is ISO 9001/TS 16949 certified and has supplied automotive sensor and fuel system components since 1946.