4-Pin Waterproof O2 Lambda Sensor Connector for Peugeot & Citroen – OEM 144998-6

Direct OEM-specification replacement for the PSA Group 4-way waterproof oxygen (O2) lambda sensor pigtail plug connector, cross-referencing part number 144998-6. Engineered for Peugeot and Citroen lambda probe harness repair in the high-temperature exhaust system environment.

Key Specifications

PSA Group OEM Fitment: 144998-6

The 144998-6 is a PSA Group OEM part number used across Peugeot 206, 207, 307, 308, 406, 407, 508 and Citroen C3, C4, C5, Berlingo for upstream and downstream oxygen sensor harness connections. The sealed 4-pin design withstands the high-temperature, vibration-prone environment of the exhaust system.

Common Vehicle Applications

• Peugeot 206 / 207 / 307 / 308 – upstream O2 sensor harness
• Peugeot 406 / 407 / 508 – lambda probe pigtail repair
• Citroen C3 / C4 / C5 – oxygen sensor wiring replacement
• Citroen Berlingo / Dispatch – lambda sensor harness repair
• DS and Opel/Vauxhall PSA-platform models – verify OEM part number

Package Contents

1 × 4-Way Waterproof O2 Sensor Pigtail Plug (144998-6) with wire leads and terminal inserts pre-installed.

Frequently Asked Questions

Q: Which Peugeot and Citroen models use the 144998-6 O2 sensor connector?
A: The 144998-6 is used across Peugeot 206–508 and Citroen C3–C5 for lambda sensor harness connections. Cross-reference your vehicle’s parts catalogue or wiring diagram to confirm fitment for your specific year and engine variant.

Q: Is this connector compatible with aftermarket O2 sensors for Peugeot?
A: Yes, provided the aftermarket sensor uses the same 4-pin PSA connector interface. Verify pin count and wire gauge against your sensor’s datasheet before installation.

Q: What is the temperature rating of this O2 sensor connector?
A: The PA66 nylon housing is rated for continuous service from -40°C to +120°C. For exhaust-proximate locations exceeding 120°C, ensure adequate heat shielding is in place before installation.