4-Pin 1-2203773-2 / 2-1564559-1 Waterproof Connector – VW Audi Chevrolet Buick

Direct-fit replacement for TE Connectivity part numbers 1-2203773-2 (male housing) and 2-1564559-1 (female housing), a 4-pin IP68 waterproof connector used in sensor, actuator, and body harness circuits on VW, Audi, Chevrolet, and Buick platforms. The rubber wire seals and cavity plugs maintain IP68 integrity in exposed under-hood and exterior harness locations.

Key Specifications

• OEM Part Numbers: 1-2203773-2 (male) / 2-1564559-1 (female)
• Pin Count: 4
• Gender: Male & Female set (with wire)
• Wire Gauge: 20 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 5A per pin

Pin Assignment Reference (4-Pin Sensor)

Note: Verify pin assignment with vehicle-specific wiring diagram before installation.

Compatible Applications

• VW / Audi: Sensor harness connectors – MAF, MAP, coolant temperature, throttle body
• Chevrolet / Buick: Body harness and sensor connectors – O2 sensor, ABS, transmission
• General: Actuator connectors, solenoid valve harness, exterior lighting circuits

1-2203773-2 vs 2-1564559-1 – What Is the Difference?

1-2203773-2 is the male plug (pin side); 2-1564559-1 is the female receptacle (socket side). Both are required for a complete mated connector pair. The set sold here includes both male and female housings with wire and terminal inserts.

Diagnosis – Common Faults

• Intermittent sensor codes after rain or car wash: Inspect wire seal integrity – a damaged rubber seal allows moisture ingress and causes intermittent open-circuit faults
• VW/Audi fault codes: P0100–P0104 (MAF), P0115–P0118 (ECT), P0120–P0123 (TPS) – check connector before replacing sensor
• Chevrolet/Buick fault codes: P0335 (CKP sensor), P0500 (VSS), P0741 (TCC solenoid) – connector corrosion is a common root cause

FAQ

Q: Is 1-2203773-2 compatible with Audi A4 / A6 sensor harness?
A: This connector family is used across multiple VW Group platforms. Confirm the 4-pin housing profile and wire gauge match your vehicle's harness before installation.

Q: What crimping tool is required?
A: TE Connectivity 91516-1 or equivalent precision micro-crimper for 0.5 mm² (20 AWG) terminals.

Q: Can I use this connector in an exposed exterior location?
A: Yes – the IP68 rating allows use in exposed under-hood and exterior locations provided the wire seals are correctly installed and the cavity plugs are in place for unused pins.

Package Contents

1 × 4-Pin Male Connector (1-2203773-2) + 1 × 4-Pin Female Connector (2-1564559-1), each with 20 AWG wire and terminal insert