4-Pin 6185-1169 Sumitomo Waterproof O2 Sensor Connector – Nissan Automotive Harness

Direct-fit replacement for Sumitomo OEM part number 6185-1169, a 4-pin waterproof connector used for oxygen (lambda) sensor harness connections on Nissan vehicles. Sumitomo Electric is the primary connector supplier for Nissan harnesses – the 6185-1169 is an OEM-grade replacement for O2 sensor wiring in exposed underbody locations.

Key Specifications

• OEM Part Number: 6185-1169
• Pin Count: 4
• Gender: Female socket (with wire)
• Waterproof Rating: IP68
• Wire Gauge: 18 AWG (0.5 mm²)
• Wire Length: 5.5 inches (140 mm)
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 10A per pin

O2 Sensor Pin Assignment (4-Pin Sumitomo)

Compatible Nissan Vehicles

• Nissan Altima: 2.5L QR25DE and 3.5L VQ35DE – upstream and downstream O2 sensor harness
• Nissan Sentra / Sylphy: 1.8L and 2.0L engine O2 sensor wiring
• Nissan X-Trail / Rogue: 2.5L QR25DE O2 sensor harness
• Nissan Navara / Frontier: 2.5L YD25DDTi diesel O2 sensor connector
• Infiniti G35 / G37: VQ35DE / VQ37VHR O2 sensor harness

Fault Codes Linked to 6185-1169 Connector Failure

• P0030 / P0050 – O2 Sensor Heater Control Circuit (Bank 1/2)
• P0131 / P0151 – O2 Sensor Circuit Low Voltage
• P0136 / P0156 – O2 Sensor Circuit (downstream)
• P0420 / P0430 – Catalyst Efficiency Below Threshold (caused by downstream O2 connector fault)

Frequently Asked Questions

Q: Is 6185-1169 a Sumitomo or Yazaki connector?
A: 6185-1169 is a Sumitomo part number. The 6185-XXXX series is Sumitomo's standard waterproof connector family for Nissan harnesses. Do not substitute with Yazaki connectors – they are not interchangeable.

Q: Can a bad O2 sensor connector cause a P0420 cat code on Nissan?
A: Yes. A corroded or open-circuit 6185-1169 connector at the downstream O2 sensor causes the ECM to lose catalyst efficiency data, triggering P0420. Always inspect the connector before replacing the catalytic converter.

Q: What crimping tool is needed?
A: Use a ratchet crimper for 0.5mm² (18 AWG) Sumitomo terminals – Hozan P-706 or Engineer PA-09.

Package Contents

1 × 4-Pin Female Connector (6185-1169) with 18 AWG wire and terminal insert