5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
When installing a new/used engine on a 5 series is it a necessity to reprogram the computer/chip on the car? Say when a 1997 528i gets a used 1999 engine installed with a perfect fit? Any ideas about the consequences?
I lost an engine in a flood and I did replace it with the 99 engine. Works fine if not better than the 97. My concern is really about UPDATING the communication path between the old ECU and the newer engine if it is required. As you know it may run fine for now but two/three months down the line? God knows.The transmission did act up again and I did try to get fluids for it; no success. But I am waiting for 25 liter drum of this life-time fluid shipped (to me yesterday) from Germany!!
The obcd2 is something I am currently taking an interest in and I have been surfing the net trying to find an answer to your question. Unfortunately I have been unable to find anything of any consequence at this time but will endeavour to continue until I do.
In all honesty though judging by the way these things work - from sensors - I think there is a very good chance that the obc will just read in data from the sensors and adjust to any changes itself.
Also I heard when it gets plugged into the diagnostic machine; the latter does read the serial number of the original engine. I did not verify this one yet. All in all; it seems (at least for now) reprogramming is a matter of feeding the chip with the new engine's info. for identification purpose. This will hold true until we hear otherwise/prove otherwise. Will keep you posted though
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