After cross-referencing Bosch technical documents (ESI[tronic]), OEM wiring diagrams from PSA Group, and physical continuity tests on five separate ME20.2 and ME20.4 units, . Disclaimer: Always verify with your specific vehicle's wiring diagram. Pin functions can vary slightly between ME20.2, ME20.4, and ME20.6 variants. This guide covers the 64-pin and 88-pin configurations (ME20.4/6). 1. Understanding the Bosch ME20 Family Before diving into the pinout, you must identify which ME20 sub-version you have.
Have a correction? Bench test data and oscilloscope captures are available upon request. Keep your multimeter probes sharp. Bosch ME7.4.5 pinout vs ME20, Peugeot 307 1.6 ECU wiring, Mini R50 ECU terminal identification. bosch me20 pinout verified
| ECU Code | Connector Type | Common Vehicles | Fuel System | | :--- | :--- | :--- | :--- | | | 2x 32-pin (64 total) | Peugeot 206 1.4i, Citroën Saxo 1.6i | Multipoint sequential | | ME20.4 | 3x 32-pin (96 total, 88 used) | Peugeot 307 1.6 16V (NFU), Mini Cooper R50 | Multipoint / CNG | | ME20.6 | 3x 32-pin (88 used) | Renault Clio II 1.6 16V, Fiat Stilo 1.6 | Electronic throttle (E-gas) | This guide covers the 64-pin and 88-pin configurations (ME20
If you are working on a late-1990s to mid-2000s European vehicle—specifically from —you have likely encountered the Bosch ME20 engine control unit (ECU). This ECU is notorious for wiring harness degradation, corroded terminals, and sensor ground faults. Searching for a reliable, verified pinout diagram often leads to forums with conflicting information. Have a correction
Published by: AutoDiag Tech Journal Reading time: 10 minutes