ecu interchange?
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ecu interchange?
my '79 e12 came with a ecu # 0 280 001 118, i think its the original, but have no way of knowing for sure. can i use a ecu with the # 0 280 001 122?
the early nineties called. they want their awesome back
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- John in Simi Valley
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- alotawatts
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These numbers must correspond to build years correct ? If so which number is which year ..or vise versa... ?John in Simi Valley wrote:Yes, the -122 will work in place of the -118.
Ive been wondering if my 79 will work in my 81's !
And OT but I'm wondering about the distributors also...different numbers for 79 - 80/81
Three E12's and one R27
The 118 ECU was 79 only, then they went to the later one. IIRC the main difference is one, I think the early one, goes to closed loop based on temp and the later one does it by O2 output.
Distributors may be dual diaphram or single, but I'm not sure on that one.
Distributors may be dual diaphram or single, but I'm not sure on that one.
Mike W.
1980 528i, 3.5 euro, 5 speed conversion
1981 528i, 3.6, Recaros and more. Project
1998 328is, quick and efficient, but not satisfying
2000 528iit, Vacation mobile/wife's grocery getter
1980 528i, 3.5 euro, 5 speed conversion
1981 528i, 3.6, Recaros and more. Project
1998 328is, quick and efficient, but not satisfying
2000 528iit, Vacation mobile/wife's grocery getter
I understand to pay attention to serial numbers. If I cleaned up a parts car distributor or other component, don't just switch the cruddy one from the '81 being rebuilt, to a clean one that looks the same, as it may not be.
Distributor now, as I was informed all that came off was a running group and changing things wholesale invited a calamity of variables if the new group didn't run.
Distributor now, as I was informed all that came off was a running group and changing things wholesale invited a calamity of variables if the new group didn't run.
FYI, the 79 harnesss probably won't have the pin for the o2 sensor. You can unplug the harness, solder a small wire to the pin on the ecu and run it thru the hole in the plug to connect to an O2. Gently guide the wire thru the plug while plugging back up to the ecu. Don't remember the pin #, but it's on the pin out in faq section.
Uh, no, on US spec cars it will. 79 was the first year BMW went to O2 sensor and 3 way cat on a car, it was 528i specific and the rest of the line kept the evil thermo reactors. Unless it's been hacked, and badly, a 79 is definitely set up for an O2 sensor.douginky wrote:FYI, the 79 harnesss probably won't have the pin for the o2 sensor. You can unplug the harness, solder a small wire to the pin on the ecu and run it thru the hole in the plug to connect to an O2. Gently guide the wire thru the plug while plugging back up to the ecu. Don't remember the pin #, but it's on the pin out in faq section.
Mike W.
1980 528i, 3.5 euro, 5 speed conversion
1981 528i, 3.6, Recaros and more. Project
1998 328is, quick and efficient, but not satisfying
2000 528iit, Vacation mobile/wife's grocery getter
1980 528i, 3.5 euro, 5 speed conversion
1981 528i, 3.6, Recaros and more. Project
1998 328is, quick and efficient, but not satisfying
2000 528iit, Vacation mobile/wife's grocery getter
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