Bosch Me711 Pinout [updated] May 2026

| Pin | Function | Wire Color (Typical VAG) | Notes | |------|-----------------------|--------------------------|------------------------------------------| | | Switched B+ (Terminal 15) | Black/Violet | Ignition-on power (from relay) | | T2 | Permanent B+ (Terminal 30) | Red/Black | Direct to battery (fused) | | T3 | Permanent B+ | Red/Black | Second main power feed | | T1 | ECU Main Ground | Brown | Chassis ground (near battery tray) | | T3 | ECU Ground (Sensor return) | Brown/Yellow | Analog sensor ground | | 50 | Power Supply Ground | Brown | Internal logic ground | ⚠️ Warning: Pins T1 and T3 are critical. A poor ground here causes erratic idle, dead throttle, and crank/no-start. 2. Ignition & Fuel Control (Actuators) These pins control the engine’s combustion events.

| Feature | ME7.1 (rare) | ME7.1.1 (common) | |-------------------------|-------------------|----------------------| | Injector pins | 85-88 only | 82-85 | | Extra 5V sensor supply | No | Yes (pin 60) | | Secondary O2 sensor | Not pinned | Pin 100 | | Electronic throttle | Sometimes cable | Always drive-by-wire | bosch me711 pinout

This information is for educational purposes. Modifying or repinning an ECU can cause engine damage if done incorrectly. Always verify with factory documentation for your specific vehicle. Keywords incorporated: bosch me711 pinout, ME7.1.1 wiring, Bosch ME711 connector, Audi 1.8T ECU pinout, bench harness ME711. | Pin | Function | Wire Color (Typical

Introduction The Bosch ME7.1.1 (often shortened to ME711 in casual conversation, though the correct industrial suffix is 7.1.1) is one of the most iconic Engine Control Units (ECUs) from the late 1990s and early 2000s. Found predominantly in Audi, Volkswagen, Seat, and Skoda models with 1.8T 20V engines (codes like AEB, ATW, AWM, and B5), this ECU represents a sweet spot between analog simplicity and early drive-by-wire sophistication. Ignition & Fuel Control (Actuators) These pins control