2-Pin 1928403876 Bosch Waterproof 3.5mm Female Connector – Automotive Sensor Harness

Direct-fit replacement for Bosch OEM part number 1928403876, a 2-pin waterproof 3.5mm pitch connector from the Bosch connector series used across European OEM sensor harness applications. Bosch is the primary connector supplier for Volkswagen Group (VW, Audi, Skoda, SEAT), Mercedes-Benz, and BMW sensor harnesses – the 1928403876 is one of the most widely used 2-pin waterproof formats in this ecosystem.

Key Specifications

• OEM Part Number: 1928403876
• Pin Count: 2
• Gender: Female (with wire)
• Terminal Pitch: 3.5mm
• Wire Gauge: 18 AWG (0.5 mm²)
• Wire Length: 5.5 inches (140 mm)
• Waterproof Rating: IP68
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 10A per pin

Compatible Vehicles & Applications

• Volkswagen: Golf, Passat, Tiguan, Polo – engine sensor harnesses
• Audi: A3, A4, A6, Q5 – coolant temperature, oil pressure, and MAP sensor connectors
• Skoda / SEAT: Shared VW Group platform sensor harness
• Mercedes-Benz: C-Class, E-Class – body and engine sensor wiring
• BMW: 3 Series, 5 Series – sensor harness applications

Bosch Part Number Structure – 1928403876

Bosch connector part numbers follow the format 1 928 4XXXXX:

• 1 928 4: Bosch connector housing series prefix
• 03876: Specific housing variant (pin count, pitch, color, seal type)
• The 1928403XXX series covers Bosch's standard automotive connector housing range used across European OEM harnesses

Common Fault Codes Linked to This Connector

• P0116–P0118 – ECT sensor circuit faults (VW/Audi)
• P0520–P0522 – Oil pressure sensor circuit faults
• P0106–P0108 – MAP sensor circuit range/performance

Frequently Asked Questions

Q: What is the mating male connector for 1928403876?
A: The mating male plug in the Bosch series is 1928403875 (2-pin male, 3.5mm). Verify the male housing part number on your vehicle harness before ordering.

Q: Is this connector compatible with VW VCDS / Ross-Tech diagnostics?
A: The connector itself is not diagnostic-tool specific. However, when replacing a sensor connector on a VW/Audi vehicle, clear fault codes with VCDS after repair to confirm the fault is resolved and not stored as a pending code.

Q: What crimping tool is needed for Bosch 3.5mm terminals?
A: Use a ratchet crimper rated for 18 AWG (0.5 mm²) Bosch terminals – the Engineer PA-09 or Bosch-compatible crimper. Bosch terminals require a specific crimp geometry – use a ratchet crimper to ensure consistent results.

Package Contents

1 × 2-Pin Female Connector (1928403876) with 18 AWG wire and terminal insert