where do i find my ECU #?

[der affe]

what is the number grouping that you use to tell what ecu you have? as in 173, 153, etc etc, etc.

i was told that my had a chip in it along with the split sceond arc2a and maf conversion. i just opened it up and it is stock. i was looking to get a used chip and try it out, but i am not sure which one it is i have

the car is a 91 325i, motronic 1.3, the ecu has a white label and says made in spain.

help is appriciated.

greg

[nategt]

the bosch #
X XXX XXX 173 (last three)

https://80-75-156-107.colo.gravityinternet.net/e30zonewiki/index.php/Image:Motronic_unit.jpg

[Farbin Kaiber]

it's the last three digits on the P/n.

eg:

[der affe]

ok, so right under the word bosch it says 0 261 200 525 and in little numbers 965

on the bottom of the tag it has a bmw symbol then
1 730 527 and in small numbers 001

[Farbin Kaiber]

Is it a reman from an outside company? (eg - Programa)

[der affe]

no reman stickers on it anywhere.
wrong ecu maybe?
it doesn't even say remunufactured by bosch on it.
if it is wrong that would explain some things and just be another hack that the PO had done to the car.

[nategt]

325i/is/iX
E30
M20/B25 (170hp)
87-91
0 261 200 525
Bosch Motronic M1.3

from http://www.bimmerboard.com/forums/posts/93517

true or not ? i dont know. havent verified...

edit: and from http://e30world.com/specifications/BMW-E30-specs-table

[Jean]

525 is OEM, also used in some e34 525i cars with b25s IIRC.

If your chip won't work with 525 for some reason I have a good 173.

[der affe]

i don't have a chip yet.
the car started acting up last night, dying randomly. stomp test gave me a 1215 code for maf issues. started playing with wires because of the split second maf conversion and the po's crappy install job. i always start there when i get that code. after searching around without it starting and pulled the ecu to see if there was anything wrong with it. opened it up and nothing was burnt, i looked at the chip and it still had the plastic cover on it . popped it off and found out it was a stock chip.

i reinstalled it abd did a stomp test and got a 1444, but it will not fire and the plugs are wet with gas . so either they are gas fouled from before or i am not getting a spark. i am removing them and cleaning them right now si can try again.

[der affe]

jean, what is the difference between the 2 ecus?

[Jean]

525 and 173 are both Motronic 1.3....

http://www.pelicanparts.com/bmw/tech...DME-Repair.htm

[nando]

jean, what is the difference between the 2 ecus?

just a revision of the same hardware/software. if you open up a 173 and 525 and set them next to each other, they're virtually indentical.

[der affe]

i just need to get my shit together and go MS.
I AM WHINEY BECAUSE IT IS F'ing cold and windy too.
it was 87 yesterday. today it was 57. wtf?