Does anyone have any information on what ECU's from other models would be compatable with my car?
Most of the ECU's for similar models will have differing numbers but do the same job. When the cars are built they are given a part number for the ECU (and any other part for that matter) and this is to identify that part to the guys who actually build the car on line. But if there is a slight change, even one as silly as changing the mounting bracket (or re-mapping etc) or the series of the part, the number is changed to reflect this. As the manufacturing life of the car continues and options are added this will also affect the part number on the ECU but will have no effect on the workings of it for the earlier cars. Chances are you could try any ECU from a similar car and it would work. Some might be geared more toward economy and others toward performance but as long as they are for the same car and similar spec then you should be ok.
I did an ECU swap with one of my cars for a much later ECU with a completely different number and it still runs fine.
Any thoughts on this anyone?
I've done a lot of research this evening and have found information that suggests that the E36 320i, E36 325i, E34 520i & E34 525i all with the M50 engine can take the same ECU as long as you swap the chip over from your old DME. I also found information that I should have a Bosch DME and not a Siemens. Apparently all BMW's from 1985 onwards, are fitted with Bosch equipment, so I don't understand how I have ended up with a Siemens DME in my car
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