Motronic 0 261 200 081 replace or repair

[DigginMyE30]

Looking for a replacement Bosch Motronic M1.0 model# 0 261 200 081 for my ‘86 325i/ECE E30 M20/B25 (171hp). It appears to be one of the rare models.


Does anyone have a line on a used one in good working order?

Any sites other than Ebay for searching used parts such as this?

Otherwise I’d like to hear if anyone has used a specific company to repair/re-manufacture a Motronic unit.

Any other insightful recommendations would be appreciated.

[cunninglinguist]

http://www.autotekelectronics.com/autotek/index.php?Page=Results&all=&Manufacturer=&CatDescription=&MakeDesc=&ModelDesc=&YearFrom=&EngineSize=&EngineCode=&PartNumber=12141714389&startlimit=(0%20-&endlimit=25)&search=&PartID=&

[jlevie]

I think you can use any M20B25 DME (a 153 or later) on this engine. The car should have a 153 at present, but a 173 (or later) will have better idle control.

[nando]

I don't think the early 325i can use the later DME. the 153 DME is Motronic 1.1 with the 55 pin connector, the earlier euro market cars have a 35 pin connector instead IIRC.

of course you can still do it but you'd have to convert the whole harness & sensors to 1.1/1.3.

[DigginMyE30]

nando is correct, I would need to make a harness/sensor conversion to use 1.1/1.3.

As an update, I had a consultation with Mark from Enhanced Automotive Technology. Sent him a couple of pictures of the PCB's of the DME. He had me take an extra pic of a specific location where the leads of the large transistor that is mounted on the heat sink land on the back side of the board. He spotted a minute crack on one of the leads, suggested that if I was comfortable I could get out my soldering iron and some electronic solder and repair it myself. My understanding is that this transistor drives the coil.

My car is back together and running.