VAG 4B0973712 4-Way Female 1.5mm Coolant Sensor Connector

The Component: Genuine VAG high-performance sealed female receptacle connector plug housing. 1.5mm Interconnect taxonomy / 4-position single-row female casing / Standard D-Shape Keying Profile (Jet Black Housing Shell / Premium Heat-Stabilized PA66 / Sealed Waterproof / 1x4 Quadrant Grid Layout / Female Sensor and Device Repair Plug / Component Variant Alias: 4B0 973 712 / Global Order Reference: 4B0973712).

Applications & Fitment: Engineered as a premium, high-reliability original equipment (OE) wire-to-device waterproof connection plug designed explicitly for harsh under-hood environmental conditions, high-vibration cooling systems, and critical engine management networks. This 4-pin female housing block is an absolute wiring loom staple across the entire Volkswagen Audi Group vehicle portfolio—heavily integrated inside VW, Audi, Seat, and Skoda factory electrical frames. It is standardly deployed across critical vehicle sensing subsystems, most notably serving as the primary factory connector interface for the iconic 4-pin green/black coolant temperature sensor (CTS) module, localized ambient air senders, windshield washer pump triggers, and targeted brake fluid reservoir monitors. It features an integrated high-stiffness mechanical top-mounted locking clip latch that seats cleanly over the mating device header's retention ramp, establishing an absolute, low-tolerance interface hold resilient to continuous engine thermal expansion and extreme multi-axis structural harmonics. Engineered to conform to rigid tier-1 German factory validation guidelines, its internal cavities pair with individual single-wire seals and a pre-installed inner purple locking mechanism to ensure absolute terminal position assurance (TPA) and a robust barrier against high-pressure moisture ingress, road salt spray, engine bay dirt, and hot oil misting. Highly vulnerable to top latch tab snapping if field service technicians attempt forced leverage with heavy un-profiled workshop metal tools during diagnostic extractions.

Technical Attributes:

- Manufacturer Part Number: 4B0973712 / 4B0 973 712 (Brand: VAG / Germany Genuine Class)

- Product Series Taxonomy: 1.5mm Sealed Automotive Interconnect Family

- Configuration: 4-Position / 4-Way Female Receptacle Plug, Single-Row 1x4 Casing

- Profile Alignment: Classic VAG "D-Shape" structural outer geometry to prevent blind cross-mating alignment errors

- Contact System Terminal Envelope: Custom-engineered to shield high-reliability 1.5mm nominal blade width flat receptacle female socket terminals (Accepts standard Micro-Timer II / MCP 1.5K series contacts)

- Connector Style: Receptacle Housing for Female Sockets (Free-Hanging Wire Loom or Direct Device Header Module Interface)

- Fastening & Locking Architecture: Features an integrated positive locking top-mounted spring-action thumb clip lever paired with a high-visibility internal violet secondary terminal lock track

- Environmental Sealing Level: High-performance waterproof and dustproof isolation utilizing a pre-installed inner rubber perimeter interface ring matrix and individual single-wire seals

- Base Structural Compound: Premium Heat-Stabilized Polyamide (PA66) engineering polymer for maximum thermal tracking resistance, rigid dimensional memory, and robust mechanical impact toughness

- Color Profile: Factory Standard Jet Black housing block assembly

- Circuit Rating Threshold: Form-fitted for standard low-voltage signaling and micro-power power distribution networks operating below 32V DC continuous

- Operational Thermal Window: Severe-duty engine compartment and radiator block layout certified to maintain material elasticity and seal compliance from -40°C up to +125°C

- Target Female Terminal Contacts (Not Included): Precision optimized to accept genuine 1.5mm flat receptacle female crimp sockets (Requires individual cavity single-wire rubber seals to preserve full IP-rated waterproof isolation)

- Mating Counterpart Interface: Pairs seamlessly inline or directly to engine modules as the female partner to matching 4-way male VAG interface configurations (Such as mating housing 4B0 973 812)

- Commercial Access: Available as loose individual housing shells or convenient trade repair connection kits containing matched terminals and wire seals. Tiered B2B wholesale trade volume pricing breaks apply instantly inside your basket for independent garages, loom remanufacturers, and trade auto-electrical stockists.