Bosch Me20 Pinout Verified Jun 2026

For those using the ME 2.0 in engine swap projects (such as the M104 or M112 engines), standalone startup requires ensuring that the Fuel Pump Relay trigger and Main Relay

Note: Always verify wire colors against a known good OEM wiring diagram, as VAG sometimes updates wiring harnesses between model years. Connector A (Main Engine Control) Injector 3 Negative 3: Injector 1 Negative 4: Fuel Pump Relay Control (Negative) 7: Throttle Actuator (Negative) 12: Ground (Main Engine Ground) 15: Ignition Coil 1/4 Signal 16: Ignition Coil 2/3 Signal 20: Throttle Actuator (Positive) 24: Fuel Injector 2 Negative 25: Fuel Injector 4 Negative 26: Main Relay Output (Power to Sensors) 28: Immobilizer W-Line (Anti-theft) 30: Ground (Main Engine Ground) Connector B (Sensors and Power) 1: TPS Signal 1 (Throttle Position) 2: Ground (Sensor Ground) 3: Mass Air Flow (MAF) Signal 4: MAP Sensor Signal (Intake Pressure) 6: Engine Coolant Temp Signal 11: +12V Permanent Battery (Terminal 30) 12: +12V Switched Ignition (Terminal 15) 15: K-Line (Diagnostic Communication) 22: Camshaft Position Sensor Signal 23: Crankshaft Position Sensor Signal 27: Oxygen Sensor 1 Signal (Pre-Cat) 30: Ground 3. Bench Flashing/Tuning Setup bosch me20 pinout verified

Pin 6 (Outputs a ground signal to trigger the fuel pump relay). Step-by-Step Guide for Bench Setup and Flashing For those using the ME 2

MAP, MAF, Crankshaft, Camshaft, Oxygen Sensors. Step-by-Step Guide for Bench Setup and Flashing MAP,

Before you wire this into your project car, note that the ME20 is not an ME7.5. It uses a weird hybrid strategy:

Attach your power supply’s negative terminal to Connector 1, Pin 1 and Pin 4 .