Wiring Question ('89 525i)

[revolve40]

Is the wiring harness and layout/diagram the same for an '89 525i as an '89 325i (both M20B25's)?

Thanks!

[E30NJ]

What transmissions are they both stick or automatic or vise versa?

[revolve40]

Both G260 5-speeds.

[SoopaGhetto]

for the engine harness, YES. This goes for the M30 too.

Source: I built a megasquirt unit based on 325i M20 Pin layout and it plug n play into e34 M30 harness. I even got the idle control for AC compensation utilizing this...

[revolve40]

for the engine harness, YES. This goes for the M30 too.

Source: I built a megasquirt unit based on 325i M20 Pin layout and it plug n play into e34 M30 harness. I even got the idle control for AC compensation utilizing this...

YES THIS IS AWESOME. I figured as much, but didn't want to fry something by using the E30 pinout. Thank you.