Oxygen Sensor Upstream 5-Wire Heated for Hyundai Elantra and Kia Spectra 2.0L L4, 2003-2009 Replacement

The Hyundai Elantra and Kia Spectra upstream 5-Wire Oxygen Sensor by WEIDA AUTO PARTS is a precise replacement designed to restore accurate exhaust monitoring for 2003–2009 Hyundai Elantra and Kia Spectra 2.0L L4 engines. This heated upstream O2 sensor uses magnetic induction to deliver fast, stable readings as soon as the exhaust reaches operating temperature, helping the engine control unit (ECU) optimize fuel trims and emissions.

With OEM reference 39210-23900, this sensor matches the original specification for reliable fit, quick installation, and durable performance in typical driving conditions—from daily commutes to highway cruising. Replacing a tired sensor can reduce exhaust emissions, improve idle stability, and restore smooth acceleration by ensuring the ECU receives accurate oxygen data during cold starts and steady-state operation.

Designed to withstand the automotive environment, the WEIDA upstream O2 sensor features a robust construction and a precise sensing element. By providing timely oxygen measurements in the exhaust stream, it helps prevent fuel over-enrichment or lean conditions that can trigger fuel economy loss or check engine lights.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Benefits & Tips

• Use case: Replace a failing upstream O2 sensor on 2003–2009 Hyundai Elantra or Kia Spectra 2.0L I4 to restore proper fuel mixture and improve driveability.
• Installation tip: Verify the OEM No. 39210-23900 matches your vehicle’s part number to ensure correct fitment before installation.
• Maintenance tip: After installation, perform a short drive cycle to allow the ECU to recalibrate fuel trims for optimal performance and emissions.

Product specifications

• Brand: WEIDA AUTO PARTS
• Part: Oxygen Sensor (Upstream, 5-Wire, Heated)
• Sensor Type: Magnetic Induction
• Wiring: 5-Wire
• Application: Upstream sensor for 2003–2009 Hyundai Elantra and Kia Spectra 2.0L L4
• OEM No.: 39210-23900
• Origin: Japan (JP)

Package includes:

• 1 x WEIDA AUTO PARTS Upstream 5-Wire Oxygen Sensor for Hyundai Elantra (2003–2009) and Kia Spectra (2.0L L4)

Warnings/Reminders

• Ensure correct sensor orientation during installation and avoid contact with hot exhaust components.
• Disconnect the battery and follow vehicle service manual guidelines when replacing sensors to prevent misfire or ECU faults.

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