4-Pin 968399-1 LPG Converter & Oxygen Sensor Connector – VW / BMW Automotive Harness

Direct-fit replacement for TE Connectivity / AMP part number 968399-1, a 4-pin connector used for LPG (liquefied petroleum gas) converter harness connections and oxygen sensor wiring on Volkswagen, BMW, and other European OEM platforms. The 968399-1 is particularly common in aftermarket LPG conversion kits where it interfaces between the LPG ECU and the vehicle's oxygen sensor circuit.

Key Specifications

• OEM Part Number: 968399-1
• Pin Count: 4
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Wire Gauge: 18 AWG (0.5 mm²)
• Wire Length: 5.5 inches (140 mm)
• Waterproof Rating: IP68
• Current Rating: Up to 13A per pin
• Operating Temperature: -40°C to +125°C

LPG Conversion – Why This Connector

In LPG bi-fuel conversion systems, the LPG ECU intercepts the oxygen sensor signal between the OEM ECU and the lambda sensor. The 968399-1 connector is used at this interception point to:

• Tap into the O2 sensor signal wire without cutting the OEM harness
• Connect the LPG ECU's lambda correction module inline with the sensor circuit
• Provide a weatherproof connection point for the LPG harness pigtail

O2 Sensor Application – Pin Assignment

Compatible Vehicles

• Volkswagen: Golf, Passat, Tiguan, Polo – LPG conversion and O2 sensor harness
• BMW: 3 Series, 5 Series, X3, X5 – LPG ECU interface connector
• Audi: A3, A4, A6 – shared VW Group platform
• Cross-reference: Verify OEM part number 968399-1 before ordering

Frequently Asked Questions

Q: Can I use 968399-1 for a standard O2 sensor replacement (non-LPG)?
A: Yes. The 968399-1 is a standard 4-pin automotive connector used for both LPG conversion harnesses and OEM O2 sensor applications on VW and BMW platforms. Verify the pin count and housing dimensions match your original connector.

Q: What LPG systems use the 968399-1 connector?
A: The 968399-1 is used in Prins, BRC, Lovato, and OMVL LPG conversion systems, as well as OEM LPG installations on VW and BMW platforms. Verify with your LPG system's wiring diagram before ordering.

Q: What crimping tool is needed?
A: Use a ratchet crimper rated for 18 AWG (0.5 mm²) – Engineer PA-09 or equivalent precision ratchet crimper.

Package Contents

1 × 4-Pin Connector (968399-1) with 18 AWG wire and terminal insert