4 Pin Denso Oxygen Sensor Connector 174259-2 174257-2 DJ70416Y-1.8 for Mazda Kia

4-Pin Denso Oxygen Sensor Connector — OEM 174259-2 / 174257-2 / DJ70416Y-1.8, Mazda Kia

OEM-compatible replacement connector for the 4-pin Denso oxygen (O2 / lambda) sensor wiring harness used in Mazda and Kia vehicles. Compatible with OEM part numbers 174259-2 and 174257-2, cross-referencing to DJ70416Y-1.8-11 and DJ70416Y-1.8-21. A faulty O2 sensor connector can trigger engine fault codes, poor fuel economy, and failed emissions tests.

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Key Specifications

• OEM part numbers: 174259-2 / 174257-2 / DJ70416Y-1.8-11 / DJ70416Y-1.8-21
• Positions: 4 pin
• Series: 1.8mm pitch, Denso
• Housing material: PA66, flame-retardant
• Contact material: Tin-plated copper alloy terminals
• Sealing: Sealed (waterproof)
• Gender: Male or Female (select option)
• High-concern chemicals: None
• Certification: CE

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Why Choose This Connector?

• Mazda / Kia Denso OEM match — direct replacement for O2 sensor harness
• Restores fuel economy — a secure connector ensures accurate O2 sensor readings
• Sealed 1.8mm series — protects O2 sensor circuits from exhaust heat and moisture
• PA66 flame-retardant housing — safe for high-temperature exhaust environments
• Male and female available — order the exact gender you need

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Typical Applications

• Mazda Kia O2 / lambda sensor wiring harness repair
• Denso oxygen sensor connector replacement
• Emissions system wiring harness maintenance
• 1.8mm series Denso sensor harness repair

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Package Contents

• 1 × connector housing + 4 terminals + seals (or 1 × pre-wired 15cm pigtail — select option)

Please verify your OEM part number before ordering. Select the correct gender (male/female) before purchasing.

Enjoy free standard shipping on all orders over $199 USD. Orders are processed within 1–2 business days.

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