One used working Megasquirt ECU for BMW E30 M20 engines.  Has base tune loaded that will also start an M30b35 engine with Motronic 1.3 wiring harness. 

Was working well on an 1990 E30 325i when pulled.   You will need a variable TPS, wide band O2 sensor, IAT and vacuum line to take full advantage of the ECU.  Wired for single coil use.  

Completely customizable and upgrade able to handle most applications and engine swaps. 

Microsquirt Board V.2.2 installed on V1.2 DIYPNP Board adapter. 

View pictures closely and verify application prior to purchase. This is not returnable.