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E28 (1982 - 1988)

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Old 04-20-2012, 11:07 AM
Tecmec Tecmec is offline
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Location: Connecticut
Join Date: Mar 2010
Posts: 21
Mein Auto: 1987 531is
1987 535 is ECM

I have a February 1987 manufacture date 535 is with the Moronic I ECM. Bosch P/N 0 261 200 059. Also marked 1 705 619 9. The unit is a 35 pin unit. I have determined that the ECM is bad (may have been lost to a quick start charger application). The unit reads out good for everything but sending a power signal to the fuel pumps. I would like to repair or replace the unit. Currently I do not see any obvious damage inside so I do not have a feel or any instructions for what to repair. Back to finding a replacement. I see some 635 csi and some 700 series units out there that have the exact P/N and markings but some save "adaptive". Others seem to indicate that they are something other than 35 pins (is this the adaptation)? Are these units in fact identical to my unit and can these units be used in my application or did BMW use the same P/N and ID for different units and different configurations? Thanks for any help and advice.

Last edited by Tecmec; 04-20-2012 at 11:13 AM. Reason: correct spelling and grammatical errors, provide clarification.
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