Bosch Motronic Ecu Pinout Jun 2026

If you only need to or log data on a 55-pin Motronic, connect to pin 38 (K‑Line) with a VAG‑KKL cable or an OBD‑1 scanner. Power on pins 9 (+12V constant) and 10 (+12V switched). Ground pins 7, 8, and 41.

: Numbers are typically embossed directly on the plastic ECU connector or the harness plug. For example, pins 1, 15, and 30 often correspond to standard DIN terminal designations (Ignition Coil, Switched 12V, and Constant Battery Power, respectively). 2. Common Pinout Assignments (55-Pin Motronic 1.x) Pinout | Bosch Motronic Ecu bosch motronic ecu pinout

Bosch Motronic systems vary significantly by generation. The first step in finding your pinout is identifying the physical connector type: Motronic M1.0 (35 Pins): Found in early 1980s BMWs and Porsches. Motronic M1.1 / M1.3 (55 Pins): If you only need to or log data