Walker 350-34166 Oxygen Sensor - Downstream

Walker 350-34166 Oxygen Sensor for Kia

Walker Products 350-34166 is a heated oxygen sensor built as a specific-fit replacement for select Kia applications. It is engineered to deliver the ECU feedback needed for downstream emissions monitoring on the listed Spectra and Sephia models.

Key Features

• Heated oxygen sensor for downstream use
• Specific-fit design for the listed Kia applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector
• Overall length: 22.17 in.; wiring harness length: 18.62 in.

Product Details

Walker Products Aftermarket focuses on OE-style engine management and oxygen/air-fuel sensors for exact application fitment. Part number 350-34166 is built for downstream bank 1 sensor 2 locations on select Kia Spectra and Kia Sephia vehicles, including 2002 Kia Spectra downstream applications and 1998-2001 Kia Sephia downstream applications. This sensor is intended to restore proper exhaust feedback to the ECU so the engine management system can monitor catalyst and emissions performance accurately.

This part cross-references no listed aftermarket part numbers in the provided data. Walker Products has supplied engine management components since 1946 and manufactures sensors for specific vehicle applications and connector positions.

Vehicle Fitment

• Fits 2002 Kia Spectra, downstream.
• Fits 2000-2001 Kia Spectra, downstream.
• Fits 1998-2001 Kia Sephia, downstream.

Common Issues This Sensor May Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor signal faults
• Stored ECU fault codes for bank 1 sensor 2 circuits

Installation Notes

Confirm the connector shape, wire count, thread diameter, and downstream position before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten service life and trigger fault codes. Verify the vehicle build date where noted for 2002 Kia Spectra applications, including the 5/22/01 cutoff referenced in the fitment data.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement parts for specific applications and positions. The brand operates under Automotive ISO9001/TS 16949 certification and builds parts to provide the diagnostic feedback required by the ECU.