81-Pin Waterproof ECU Connector – VW / Tyco 1355171-1 / 368389-1 / 368382-1, 1mm & 3.5mm Female Socket

81-pin waterproof ECU connector for Volkswagen Group vehicles — part numbers 1355171-1, 368389-1, and 368382-1 are TE Connectivity (formerly Tyco/AMP) part numbers for the female socket housing and associated components used in VW ECU main connectors. This connector uses a mixed-pitch design: 1mm pitch contacts for signal circuits and 3.5mm pitch contacts for power circuits, allowing both high-density signal routing and adequate current capacity for power circuits in a single 81-pin connector. Used in VW, Audi, Skoda, and SEAT engine control units across multiple vehicle generations.

Key Specifications

• Part Numbers: 1355171-1 (housing), 368389-1, 368382-1 (associated components)
• Manufacturer: TE Connectivity (formerly Tyco/AMP)
• Pin Count: 81 pins
• Contact Pitches: 1mm (signal contacts) + 3.5mm (power contacts)
• Housing Type: Female socket
• IP Rating: IP67
• Application: VW Group ECU main connector (VW, Audi, Skoda, SEAT)

VW ECU Connector — Mixed-Pitch Design

The 81-pin VW ECU connector uses two contact sizes in the same housing:

• 1mm pitch contacts (signal rows): For sensor inputs, actuator outputs, and CAN bus communication circuits. Low current (below 3A). Gold-plated for signal reliability.
• 3.5mm pitch contacts (power rows): For ECU power supply, ground, and high-current actuator circuits. Higher current capacity. Tin-plated acceptable for power circuits.
• Do not mix contact sizes — 1mm contacts will not seat correctly in 3.5mm cavities and vice versa. Identify the cavity size before ordering replacement contacts.

Frequently Asked Questions

Which VW/Audi vehicles use the 1355171-1 ECU connector?

The 1355171-1 connector is used in VW Group ECUs across multiple vehicle generations and engine types. Common applications include: VW Golf/Jetta/Passat with 1.8T, 2.0T, and TDI engines; Audi A4/A6 with similar engine families; Skoda Octavia and SEAT Leon with VW Group powertrains. Verify the specific ECU part number against the VW/Audi parts catalog to confirm the connector part number for your specific vehicle and engine combination.

How do I repair a VW ECU connector?

VW ECU connector repair: (1) disconnect the battery and wait 5 minutes; (2) release the connector locking lever and disconnect the ECU connector; (3) photograph the connector and wiring; (4) use a micro extraction tool to remove the damaged terminal; (5) note whether the damaged terminal is in a 1mm or 3.5mm cavity; (6) crimp the correct replacement terminal onto the wire; (7) reinsert until the locking lance clicks; (8) reinstall the back cover; (9) reconnect and verify with a scan tool.

What contacts are compatible with the 1355171-1 housing?

Cross-reference 1355171-1 in the TE Connectivity catalog to identify compatible contact part numbers for both the 1mm signal contacts and 3.5mm power contacts. The VW/Audi parts catalog also lists the terminal part numbers for each ECU connector location. Verify the contact pitch (1mm or 3.5mm) for each cavity before ordering replacement contacts.

Typical Applications

• VW Group ECU repair: ECU main connector replacement on VW, Audi, Skoda, and SEAT vehicles
• Engine management: ECU connector repair for 1.8T, 2.0T, and TDI engine management systems
• Automotive workshops: Workshop stock for VW Group ECU connector repairs

Package Contents

81-pin waterproof ECU connector (housing and components as specified by part number). Contacts and wire seals ordered separately if not included.