VW Audi 3-Pin Pressure Sensor Wire Harness Connector – OEM 4D0971993 / 4D0971993A
Direct OEM-specification replacement for the Volkswagen and Audi 3-pin pressure sensor wire harness connector. Cross-references VAG part numbers 4D0971993 and 4D0971993A. Used across the VAG platform for manifold absolute pressure (MAP) sensors, boost pressure sensors, oil pressure sensors, and fuel pressure sensors on Golf, Passat, A4, A6, and related models.
The VAG 3-pin pressure sensor connector is one of the most frequently replaced connectors in the VW/Audi ecosystem. Located in the engine bay, it is exposed to heat cycles, oil mist, and vibration. The most common failure mode is locking tab fracture — the plastic tab that retains the connector on the sensor body breaks, causing the connector to partially disengage. A partially disconnected pressure sensor connector causes the ECU to log a sensor circuit fault and enter limp mode, even though the sensor itself is undamaged. Replacing the connector restores the circuit without replacing the sensor.
| OEM Number | Notes |
|---|---|
| 4D0971993 | Original VAG part number |
| 4D0971993A | Revised / superseded part number |
| Pin | Function | Failure Symptom if Open/Corroded |
|---|---|---|
| 1 | 5V reference voltage from ECU | Sensor reads 0V, ECU logs circuit low fault |
| 2 | Signal output to ECU | Erratic or fixed pressure reading, limp mode |
| 3 | Ground / signal return | Sensor reads maximum voltage, ECU logs circuit high fault |
| Attribute | Detail |
|---|---|
| Pin Count | 3-Pin |
| OEM Part Numbers | 4D0971993 / 4D0971993A |
| Housing Material | Nylon PA66 |
| Application | MAP sensor, boost pressure sensor, oil pressure sensor, fuel pressure sensor |
| Compatible Brands | Volkswagen, Audi, SEAT, Škoda (VAG platform) |
| Terminal Included | Yes |
Q: My VW Golf is in limp mode with a P0106 or P0107 code — could it be the connector?
A: Yes. P0106 (MAP sensor range/performance) and P0107 (MAP sensor circuit low) are classic symptoms of a partially disconnected or corroded 3-pin pressure sensor connector. The ECU sees an out-of-range voltage on the signal pin (Pin 2) and enters limp mode as a safety measure. Inspect the connector locking tab and clean the terminals before replacing the MAP sensor.
Q: What fault codes does a failed VAG pressure sensor connector cause?
A: Common DTCs include P0106 (MAP range/performance), P0107 (MAP circuit low), P0108 (MAP circuit high), P0191 (fuel rail pressure sensor range), P0521 (oil pressure sensor range), and P0299 (turbocharger underboost — from boost pressure sensor fault). The specific code depends on which sensor uses this connector.
Q: Is this the same connector used for the oil pressure sensor and the MAP sensor?
A: Yes. VAG standardised the 3-pin connector housing (4D0971993) across multiple pressure sensor types on the same platform. The same housing is used for MAP, boost, oil pressure, and fuel pressure sensors — only the terminal wire colours differ by application.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
Q: Does this fit SEAT and Škoda vehicles?
A: Yes. SEAT (Ibiza, Leon, Altea) and Škoda (Octavia, Fabia, Superb) share the VAG platform and use the same 4D0971993 connector family for pressure sensors.
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