E30 Zone

I HAVE JUST REMOVED THE ENGINE FROM MY D REG 325 SPORT (CRACKED HEAD ) TO DISCOVER THAT ITS HAD A LATER ENGINE FITTED , I HAVE PURCHASED THE CORRECT ENGINE WITH LOOM, IE EARLY TYPE AND WOULD LIKE TO KNOW IF ANYONE COULD TELL ME THE ECU NUMBER I WOULD NEED ,THANKS

you need an 073 ECU, its the smaller type unit with only 2 rows on the connector not three dude.

THANKS FOR THAT I MAY HAVE ONE OF THOSE !