This guide contains essential electrical diagnostic information for the Bosch Motronic ME9.2 engine control unit. This DME manages the early versions of the innovative BMW N52 straight-six engine (2.5L and 3.0L), which features Valvetronic (valveless throttle control) technology. The page provides complete pinout tables for all connectors, wiring schematics for power supply, Double VANOS, and all critical sensor and actuator signals. This information is indispensable for accurate electrical troubleshooting on models like the E90/E91 (3 Series) and E60/E61 (5 Series).
134 pins - 5 modular connectors
ME 9.2 ECM Inputs - Processing - Outputs
Sensors
| Accelerator Pedal |
| Hot Film Air Mass Meter (HFM) |
| Knock Sensor 1 |
| Knock Sensor 2 |
| Knock Sensor 3 |
| Knock Sensor 4 |
| Crankshaft Sensor |
| Oxygen Sensor Post Catalytic Converter 1 |
| Oxygen Sensor Post Catalytic Converter 2 |
| Oxygen Sensor Pre Catalytic Converter 1 |
| Oxygen Sensor Pre Catalytic Converter 2 |
| Coolant Outlet Temperature Sensor |
| Water Temperature Sensor |
| Exhaust Camshaft Sensor 1 |
| Exhaust Camshaft Sensor 2 |
| Intake Camshaft Sensor 1 |
| Intake Camshaft Sensor 2 |
| Intake Manifold Pressure Sensor |
| Oil Condition Sensor |
| Barometric Pressure Sensor in the ECM (P2) |
| Variable Intake Manifold Position Sensor |
Actuator
| Variable Intake Manifold |
| Electronic Throttle Valve (EDK) |
| Injector Valves 1-8 |
| Electronic Fan |
| Electronic Box Fan |
| Secondary Air Pump |
| Evaporator Emission Valve |
| VANOS Exhaust Camshaft 1 |
| VANOS Intake Camshaft 1 |
| VANOS Exhaust Camshaft 2 |
| VANOS Intake Camshaft 2 |
| Valvetronic Control Module |
| Ignition Coils 1-8 |
| Map Controlled Thermostat |
Engine Wiring Harness
1. Plug connectors to electronic box modules: ECM, Valvetronic and IVM
2. Plug connectors to fuel injectors
3. Valvetronic position sensor plug connector
4. Camshaft position sensors plug connectors
5. Plug connector to ignition coils