4-Pin 2.5mm Waterproof O2 Sensor Connector – PBT GF30 OEM 1-1813099-1

Direct-fit replacement for TE Connectivity part number 1-1813099-1, a 4-pin 2.5mm pitch IP68 waterproof female connector with PBT GF30 (polybutylene terephthalate, 30% glass-filled) housing used for oxygen (O2/lambda) sensor harness connections. The PBT GF30 material provides superior heat resistance and dimensional stability compared to standard PA66 nylon, making it suitable for high-temperature exhaust proximity locations.

Key Specifications

• OEM Part Number: 1-1813099-1 (TE Connectivity)
• Pin Count: 4
• Gender: Female (with wire)
• Terminal Pitch: 2.5mm
• Wire Gauge: 20 AWG (0.5 mm²)
• Wire Length: 5.5 inches (140 mm)
• Waterproof Rating: IP68
• Housing Material: PBT GF30 (polybutylene terephthalate, 30% glass-filled)
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 5A per pin

O2 Sensor Pin Assignment (4-Pin Heated)

PBT GF30 vs PA66 – Why Material Matters for O2 Sensor Connectors

O2 sensor connectors are located near the exhaust manifold and catalytic converter, where ambient temperatures can exceed 150°C. PBT GF30 has a continuous service temperature of up to 155°C and superior resistance to engine oil, fuel, and exhaust condensate compared to standard PA66 (max ~120°C). Using a PA66 connector in a high-temperature O2 sensor location will cause housing deformation and terminal loosening over time.

Compatible Applications

• Universal 4-pin 2.5mm pitch O2 sensor harness connector for automotive lambda sensor repair
• Suitable for pre-cat (upstream) and post-cat (downstream) heated O2 sensors
• Compatible with Bosch, Denso, NGK, and NTK O2 sensor pigtail harness repair

Diagnosis – O2 Sensor Faults

• P0130–P0167 (O2 Sensor Circuit): Inspect connector before replacing sensor – a heat-damaged or corroded 1-1813099-1 connector is a common root cause
• P0141 / P0161 (Heater Circuit): Check Pin 1 (12V) and Pin 2 (ground) – an open circuit prevents heater activation and causes slow sensor warm-up and rich running
• Housing melting / discoloration: Indicates sustained high temperature exposure – check heat shield integrity and replace with PBT GF30 housing only

FAQ

Q: What does PBT GF30 mean on an O2 sensor connector?
A: PBT = polybutylene terephthalate (a high-temperature engineering plastic); GF30 = 30% glass fibre reinforcement. Together, PBT GF30 provides a continuous service temperature of 155°C and superior chemical resistance compared to standard PA66 nylon – essential for connectors located near the exhaust system.

Q: Can I use a PA66 connector instead of PBT GF30 for an O2 sensor?
A: Not recommended – PA66 has a lower heat resistance (max ~120°C) and will deform near the exhaust manifold. Always use PBT GF30 housing for O2 sensor connector replacements.

Package Contents

1 × 4-Pin Female Connector (1-1813099-1) with 20 AWG wire and terminal insert